21110533312 has 56 divisors (see below), whose sum is σ = 45717073920. Its totient is φ = 9592008960.

The previous prime is 21110533289. The next prime is 21110533351. The reversal of 21110533312 is 21333501112.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 2788989 + ... + 2796547.

It is an arithmetic number, because the mean of its divisors is an integer number (816376320).

Almost surely, 2^21110533312 is an apocalyptic number.

21110533312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21110533312 is an abundant number, since it is smaller than the sum of its proper divisors (24606540608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110533312 is a wasteful number, since it uses less digits than its factorization.

21110533312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11549 (or 11539 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The spelling of 21110533312 in words is "twenty-one billion, one hundred ten million, five hundred thirty-three thousand, three hundred twelve".