21700601555612 has 12 divisors (see below), whose sum is σ = 43401203111280. Its totient is φ = 9300257809536.

The previous prime is 21700601555609. The next prime is 21700601555617. The reversal of 21700601555612 is 21655510600712.

21700601555612 is an admirable number.

It is a super-2 number, since 2×21700601555612² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21700601555612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21700601555617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387510742037 + ... + 387510742092.

It is an arithmetic number, because the mean of its divisors is an integer number (3616766925940).

Almost surely, 2^{21700601555612} is an apocalyptic number.

It is an amenable number.

21700601555612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21700601555612 is a wasteful number, since it uses less digits than its factorization.

21700601555612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775021484140 (or 775021484138 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 21700601555612 in words is "twenty-one trillion, seven hundred billion, six hundred one million, five hundred fifty-five thousand, six hundred twelve".