21132023113 has 4 divisors (see below), whose sum is σ = 21132714960. Its totient is φ = 21131331268.

The previous prime is 21132023093. The next prime is 21132023161. The reversal of 21132023113 is 31132023112.

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 a de Polignac number, because none of the positive numbers 2^k-21132023113 is a prime.

It is a super-3 number, since 3×21132023113³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132023413) 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, 297883 + ... + 361936.

It is an arithmetic number, because the mean of its divisors is an integer number (5283178740).

Almost surely, 2^21132023113 is an apocalyptic number.

It is an amenable number.

21132023113 is a deficient number, since it is larger than the sum of its proper divisors (691847).

21132023113 is an equidigital number, since it uses as much as digits as its factorization.

21132023113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691846.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21132023113 its reverse (31132023112), we get a palindrome (52264046225).

Subtracting 21132023113 from its reverse (31132023112), we obtain a palindrome (9999999999).

The spelling of 21132023113 in words is "twenty-one billion, one hundred thirty-two million, twenty-three thousand, one hundred thirteen".