21320111201000 has 64 divisors (see below), whose sum is σ = 50177436688080. Its totient is φ = 8478749356800.

The previous prime is 21320111200987. The next prime is 21320111201057. The reversal of 21320111201000 is 10211102312.

It can be written as a sum of positive squares in 8 ways, for example, as 10469767432804 + 10850343768196 = 3235702^2 + 3293986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61445819 + ... + 61791818.

Almost surely, 2^{21320111201000} is an apocalyptic number.

21320111201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320111201000 is an abundant number, since it is smaller than the sum of its proper divisors (28857325487080).

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

21320111201000 is a wasteful number, since it uses less digits than its factorization.

21320111201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123237831 (or 123237817 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21320111201000 its reverse (10211102312), we get a palindrome (21330322303312).

The spelling of 21320111201000 in words is "twenty-one trillion, three hundred twenty billion, one hundred eleven million, two hundred one thousand".