21132031023 has 6 divisors (see below), whose sum is σ = 30524044824. Its totient is φ = 14088020676.

The previous prime is 21132030991. The next prime is 21132031027. The reversal of 21132031023 is 32013023112.

21132031023 is a `hidden beast` number, since 2 + 11 + 320 + 310 + 23 = 666.

It is not a de Polignac number, because 21132031023 - 2⁵ = 21132030991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21132030987 and 21132031005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132031027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1174001715 + ... + 1174001732.

It is an arithmetic number, because the mean of its divisors is an integer number (5087340804).

Almost surely, 2^21132031023 is an apocalyptic number.

21132031023 is a deficient number, since it is larger than the sum of its proper divisors (9392013801).

21132031023 is a wasteful number, since it uses less digits than its factorization.

21132031023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348003453 (or 2348003450 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21132031023 its reverse (32013023112), we get a palindrome (53145054135).

It can be divided in two parts, 2113 and 2031023, that added together give a triangular number (2033136 = T₂₀₁₆).

The spelling of 21132031023 in words is "twenty-one billion, one hundred thirty-two million, thirty-one thousand, twenty-three".