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2022012221 = 14091435069
BaseRepresentation
bin111100010000101…
…0111010100111101
312012220202212022112
41320201113110331
513120113342341
6532350423405
7101051551235
oct17041272475
95186685275
102022012221
11948411789
12485201b65
13262bb3648
14152788cc5
15bc7aeaeb
hex7885753d

2022012221 has 4 divisors (see below), whose sum is σ = 2023448700. Its totient is φ = 2020575744.

The previous prime is 2022012199. The next prime is 2022012227. The reversal of 2022012221 is 1222102202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222102202 = 2611051101.

It can be written as a sum of positive squares in 2 ways, for example, as 410872900 + 1611139321 = 20270^2 + 40139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-2022012221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2022012196 and 2022012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2022012227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 716126 + ... + 718943.

It is an arithmetic number, because the mean of its divisors is an integer number (505862175).

Almost surely, 22022012221 is an apocalyptic number.

It is an amenable number.

2022012221 is a deficient number, since it is larger than the sum of its proper divisors (1436479).

2022012221 is a wasteful number, since it uses less digits than its factorization.

2022012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436478.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2022012221 is about 44966.7902012141. The cubic root of 2022012221 is about 1264.5264718310.

Adding to 2022012221 its reverse (1222102202), we get a palindrome (3244114423).

The spelling of 2022012221 in words is "two billion, twenty-two million, twelve thousand, two hundred twenty-one".

Divisors: 1 1409 1435069 2022012221