21020122113 has 16 divisors (see below), whose sum is σ = 29259278400. Its totient is φ = 13406057280.

The previous prime is 21020122093. The next prime is 21020122129. The reversal of 21020122113 is 31122102012.

It is not a de Polignac number, because 21020122113 - 2⁶ = 21020122049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21020122092 and 21020122101.

It is not an unprimeable number, because it can be changed into a prime (21020122153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1098823 + ... + 1117788.

It is an arithmetic number, because the mean of its divisors is an integer number (1828704900).

Almost surely, 2^21020122113 is an apocalyptic number.

It is an amenable number.

21020122113 is a deficient number, since it is larger than the sum of its proper divisors (8239156287).

21020122113 is a wasteful number, since it uses less digits than its factorization.

21020122113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216752.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21020122113 its reverse (31122102012), we get a palindrome (52142224125).

The spelling of 21020122113 in words is "twenty-one billion, twenty million, one hundred twenty-two thousand, one hundred thirteen".