21112011023113 has 4 divisors (see below), whose sum is σ = 21469841718480. Its totient is φ = 20754180327748.

The previous prime is 21112011023083. The next prime is 21112011023153. The reversal of 21112011023113 is 31132011021112.

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 21112011023113 - 2¹⁷ = 21112010892041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112011023153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178915347595 + ... + 178915347712.

It is an arithmetic number, because the mean of its divisors is an integer number (5367460429620).

Almost surely, 2^{21112011023113} is an apocalyptic number.

It is an amenable number.

21112011023113 is a deficient number, since it is larger than the sum of its proper divisors (357830695367).

21112011023113 is an equidigital number, since it uses as much as digits as its factorization.

21112011023113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357830695366.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21112011023113 its reverse (31132011021112), we get a palindrome (52244022044225).

The spelling of 21112011023113 in words is "twenty-one trillion, one hundred twelve billion, eleven million, twenty-three thousand, one hundred thirteen".