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2012222101 = 2969386969
BaseRepresentation
bin111011111110000…
…0001001010010101
312012020100110210111
41313330001022111
513110112101401
6531400523021
7100602414511
oct16774011225
95166313714
102012222101
1194293527a
12481a80471
13260b66486
1415135b141
15bb9c8e51
hex77f01295

2012222101 has 4 divisors (see below), whose sum is σ = 2081609100. Its totient is φ = 1942835104.

The previous prime is 2012222089. The next prime is 2012222141. The reversal of 2012222101 is 1012222102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 394975876 + 1617246225 = 19874^2 + 40215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012222101 - 27 = 2012221973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012222141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34693456 + ... + 34693513.

It is an arithmetic number, because the mean of its divisors is an integer number (520402275).

Almost surely, 22012222101 is an apocalyptic number.

It is an amenable number.

2012222101 is a deficient number, since it is larger than the sum of its proper divisors (69386999).

2012222101 is an equidigital number, since it uses as much as digits as its factorization.

2012222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69386998.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2012222101 is about 44857.7986642234. The cubic root of 2012222101 is about 1262.4823199955.

Adding to 2012222101 its reverse (1012222102), we get a palindrome (3024444203).

Subtracting from 2012222101 its reverse (1012222102), we obtain a palindrome (999999999).

The spelling of 2012222101 in words is "two billion, twelve million, two hundred twenty-two thousand, one hundred one".

Divisors: 1 29 69386969 2012222101