20212223201 has 4 divisors (see below), whose sum is σ = 20214842004. Its totient is φ = 20209604400.

The previous prime is 20212223183. The next prime is 20212223203. The reversal of 20212223201 is 10232221202.

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 11526169600 + 8686053601 = 107360^2 + 93199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212223201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212223201.

It is not an unprimeable number, because it can be changed into a prime (20212223203) 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, 1297790 + ... + 1313271.

It is an arithmetic number, because the mean of its divisors is an integer number (5053710501).

Almost surely, 2^20212223201 is an apocalyptic number.

It is an amenable number.

20212223201 is a deficient number, since it is larger than the sum of its proper divisors (2618803).

20212223201 is an equidigital number, since it uses as much as digits as its factorization.

20212223201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618802.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20212223201 its reverse (10232221202), we get a palindrome (30444444403).

It can be divided in two parts, 2021 and 2223201, that added together give a palindrome (2225222).

The spelling of 20212223201 in words is "twenty billion, two hundred twelve million, two hundred twenty-three thousand, two hundred one".