21133331021300 has 36 divisors (see below), whose sum is σ = 48556935868140. Its totient is φ = 7956077560320.

The previous prime is 21133331021287. The next prime is 21133331021323. The reversal of 21133331021300 is 312013333112.

It can be written as a sum of positive squares in 6 ways, for example, as 1694310244 + 21131636711056 = 41162^2 + 4596916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6215683895 + ... + 6215687294.

It is an arithmetic number, because the mean of its divisors is an integer number (1348803774115).

Almost surely, 2^{21133331021300} is an apocalyptic number.

21133331021300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21133331021300 is an abundant number, since it is smaller than the sum of its proper divisors (27423604846840).

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

21133331021300 is a wasteful number, since it uses less digits than its factorization.

21133331021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12431371220 (or 12431371213 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21133331021300 its reverse (312013333112), we get a palindrome (21445344354412).

The spelling of 21133331021300 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred thirty-one million, twenty-one thousand, three hundred".