20212122113 has 4 divisors (see below), whose sum is σ = 20467971840. Its totient is φ = 19956272388.

The previous prime is 20212122107. The next prime is 20212122143. The reversal of 20212122113 is 31122121202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20212122113 - 2⁸ = 20212121857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212122091 and 20212122100.

It is not an unprimeable number, because it can be changed into a prime (20212122143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127924745 + ... + 127924902.

It is an arithmetic number, because the mean of its divisors is an integer number (5116992960).

Almost surely, 2^20212122113 is an apocalyptic number.

It is an amenable number.

20212122113 is a deficient number, since it is larger than the sum of its proper divisors (255849727).

20212122113 is an equidigital number, since it uses as much as digits as its factorization.

20212122113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255849726.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20212122113 its reverse (31122121202), we get a palindrome (51334243315).

The spelling of 20212122113 in words is "twenty billion, two hundred twelve million, one hundred twenty-two thousand, one hundred thirteen".