21021327360000 has 1610 divisors, whose sum is σ = 85929501110772. Its totient is φ = 5096079360000.

The previous prime is 21021327359999. The next prime is 21021327360017. The reversal of 21021327360000 is 6372312012.

21021327360000 is a `hidden beast` number, since 2 + 1 + 0 + 21 + 32 + 7 + 3 + 600 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 69 ways as a sum of consecutive naturals, for example, 1911029759995 + ... + 1911029760005.

Almost surely, 2^{21021327360000} is an apocalyptic number.

21021327360000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21021327360000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42964750555386).

21021327360000 is an abundant number, since it is smaller than the sum of its proper divisors (64908173750772).

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

21021327360000 is an frugal number, since it uses more digits than its factorization.

21021327360000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

Adding to 21021327360000 its reverse (6372312012), we get a palindrome (21027699672012).

The spelling of 21021327360000 in words is "twenty-one trillion, twenty-one billion, three hundred twenty-seven million, three hundred sixty thousand".