21533055401012 has 24 divisors (see below), whose sum is σ = 39763043208000. Its totient is φ = 10182705237056.

The previous prime is 21533055400991. The next prime is 21533055401021. The reversal of 21533055401012 is 21010455033512.

It is a self number, because there is not a number n which added to its sum of digits gives 21533055401012.

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, 1314907262 + ... + 1314923637.

It is an arithmetic number, because the mean of its divisors is an integer number (1656793467000).

Almost surely, 2^{21533055401012} is an apocalyptic number.

It is an amenable number.

21533055401012 is a deficient number, since it is larger than the sum of its proper divisors (18229987806988).

21533055401012 is a wasteful number, since it uses less digits than its factorization.

21533055401012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629831015 (or 2629831013 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 21533055401012 in words is "twenty-one trillion, five hundred thirty-three billion, fifty-five million, four hundred one thousand, twelve".