21112000023 has 16 divisors (see below), whose sum is σ = 28551591936. Its totient is φ = 13873618080.

The previous prime is 21111999947. The next prime is 21112000097. The reversal of 21112000023 is 32000021112.

It is not a de Polignac number, because 21112000023 - 2⁸ = 21111999767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21111999972 and 21112000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112000123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1842490 + ... + 1853912.

It is an arithmetic number, because the mean of its divisors is an integer number (1784474496).

Almost surely, 2^21112000023 is an apocalyptic number.

21112000023 is a deficient number, since it is larger than the sum of its proper divisors (7439591913).

21112000023 is a wasteful number, since it uses less digits than its factorization.

21112000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20174.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21112000023 its reverse (32000021112), we get a palindrome (53112021135).

The spelling of 21112000023 in words is "twenty-one billion, one hundred twelve million, twenty-three", and thus it is an aban number.