21202112113 has 16 divisors (see below), whose sum is σ = 26119900800. Its totient is φ = 16759230336.

The previous prime is 21202112101. The next prime is 21202112153. The reversal of 21202112113 is 31121120212.

It is a cyclic number.

It is not a de Polignac number, because 21202112113 - 2²⁵ = 21168557681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202112153) 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, 15595 + ... + 206512.

It is an arithmetic number, because the mean of its divisors is an integer number (1632493800).

Almost surely, 2^21202112113 is an apocalyptic number.

It is an amenable number.

21202112113 is a deficient number, since it is larger than the sum of its proper divisors (4917788687).

21202112113 is a wasteful number, since it uses less digits than its factorization.

21202112113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223176.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21202112113 its reverse (31121120212), we get a palindrome (52323232325).

The spelling of 21202112113 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, one hundred thirteen".