21032120113 has 16 divisors (see below), whose sum is σ = 21431241216. Its totient is φ = 20637518400.

The previous prime is 21032120089. The next prime is 21032120119. The reversal of 21032120113 is 31102123012.

It is a cyclic number.

It is not a de Polignac number, because 21032120113 - 2²⁵ = 20998565681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21032120119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6289720 + ... + 6293062.

It is an arithmetic number, because the mean of its divisors is an integer number (1339452576).

Almost surely, 2^21032120113 is an apocalyptic number.

It is an amenable number.

21032120113 is a deficient number, since it is larger than the sum of its proper divisors (399121103).

21032120113 is a wasteful number, since it uses less digits than its factorization.

21032120113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21032120113 its reverse (31102123012), we get a palindrome (52134243125).

The spelling of 21032120113 in words is "twenty-one billion, thirty-two million, one hundred twenty thousand, one hundred thirteen".