21210200000988 has 24 divisors (see below), whose sum is σ = 49490565050640. Its totient is φ = 7070052612480.

The previous prime is 21210200000959. The next prime is 21210200001071. The reversal of 21210200000988 is 88900000201212.

It is a super-2 number, since 2×21210200000988² (a number of 27 digits) contains 22 as substring.

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, 5848048 + ... + 8753288.

It is an arithmetic number, because the mean of its divisors is an integer number (2062106877110).

Almost surely, 2^{21210200000988} is an apocalyptic number.

It is an amenable number.

21210200000988 is an abundant number, since it is smaller than the sum of its proper divisors (28280365049652).

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

21210200000988 is a wasteful number, since it uses less digits than its factorization.

21210200000988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513637 (or 3513635 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The spelling of 21210200000988 in words is "twenty-one trillion, two hundred ten billion, two hundred million, nine hundred eighty-eight", and thus it is an aban number.