21112000024 has 16 divisors (see below), whose sum is σ = 41668421400. Its totient is φ = 10000420992.

The previous prime is 21111999947. The next prime is 21112000097. The reversal of 21112000024 is 42000021112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21111999968 and 21112000013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69447217 + ... + 69447520.

Almost surely, 2^21112000024 is an apocalyptic number.

It is an amenable number.

21112000024 is a deficient number, since it is larger than the sum of its proper divisors (20556421376).

21112000024 is a wasteful number, since it uses less digits than its factorization.

21112000024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138894762 (or 138894758 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21112000024 its reverse (42000021112), we get a palindrome (63112021136).

The spelling of 21112000024 in words is "twenty-one billion, one hundred twelve million, twenty-four", and thus it is an aban number.