21113013113 has 8 divisors (see below), whose sum is σ = 21419946240. Its totient is φ = 20807902080.

The previous prime is 21113013101. The next prime is 21113013127. The reversal of 21113013113 is 31131031112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21113013113 - 2²⁰ = 21111964537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21113013091 and 21113013100.

It is not an unprimeable number, because it can be changed into a prime (21113013143) 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 7 ways as a sum of consecutive naturals, for example, 432173 + ... + 478538.

It is an arithmetic number, because the mean of its divisors is an integer number (2677493280).

Almost surely, 2^21113013113 is an apocalyptic number.

It is an amenable number.

21113013113 is a deficient number, since it is larger than the sum of its proper divisors (306933127).

21113013113 is an equidigital number, since it uses as much as digits as its factorization.

21113013113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911047.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21113013113 its reverse (31131031112), we get a palindrome (52244044225).

The spelling of 21113013113 in words is "twenty-one billion, one hundred thirteen million, thirteen thousand, one hundred thirteen".