21554233112 has 32 divisors (see below), whose sum is σ = 40503743280. Its totient is φ = 10753269120.

The previous prime is 21554233109. The next prime is 21554233157. The reversal of 21554233112 is 21133245512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12730538 + ... + 12732230.

Almost surely, 2^21554233112 is an apocalyptic number.

It is an amenable number.

21554233112 is a deficient number, since it is larger than the sum of its proper divisors (18949510168).

21554233112 is a wasteful number, since it uses less digits than its factorization.

21554233112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283 (or 4279 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

Adding to 21554233112 its reverse (21133245512), we get a palindrome (42687478624).

The spelling of 21554233112 in words is "twenty-one billion, five hundred fifty-four million, two hundred thirty-three thousand, one hundred twelve".