21131033023 has 2 divisors, whose sum is σ = 21131033024. Its totient is φ = 21131033022.

The previous prime is 21131033017. The next prime is 21131033047. The reversal of 21131033023 is 32033013112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21131033023 - 2⁵ = 21131032991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21131033003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565516511 + 10565516512.

It is an arithmetic number, because the mean of its divisors is an integer number (10565516512).

Almost surely, 2^21131033023 is an apocalyptic number.

21131033023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21131033023 is an equidigital number, since it uses as much as digits as its factorization.

21131033023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21131033023 its reverse (32033013112), we get a palindrome (53164046135).

The spelling of 21131033023 in words is "twenty-one billion, one hundred thirty-one million, thirty-three thousand, twenty-three".