21110512023 has 24 divisors (see below), whose sum is σ = 31784548848. Its totient is φ = 13488913152.

The previous prime is 21110512021. The next prime is 21110512037. The reversal of 21110512023 is 32021501112.

21110512023 is a `hidden beast` number, since 21 + 110 + 512 + 0 + 23 = 666.

It is not a de Polignac number, because 21110512023 - 2¹ = 21110512021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110511987 and 21110512005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110512021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 450786 + ... + 495407.

It is an arithmetic number, because the mean of its divisors is an integer number (1324356202).

Almost surely, 2^21110512023 is an apocalyptic number.

21110512023 is a deficient number, since it is larger than the sum of its proper divisors (10674036825).

21110512023 is a wasteful number, since it uses less digits than its factorization.

21110512023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946303 (or 946300 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The spelling of 21110512023 in words is "twenty-one billion, one hundred ten million, five hundred twelve thousand, twenty-three".