21100301331021 has 48 divisors (see below), whose sum is σ = 33281025628032. Its totient is φ = 12775734518400.

The previous prime is 21100301330981. The next prime is 21100301331059. The reversal of 21100301331021 is 12013310300112.

21100301331021 is a `hidden beast` number, since 2 + 1 + 10 + 0 + 301 + 331 + 0 + 21 = 666.

It is not a de Polignac number, because 21100301331021 - 2⁹ = 21100301330509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21100301330985 and 21100301331003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100301731021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 447861256 + ... + 447908366.

It is an arithmetic number, because the mean of its divisors is an integer number (693354700584).

Almost surely, 2^{21100301331021} is an apocalyptic number.

It is an amenable number.

21100301331021 is a deficient number, since it is larger than the sum of its proper divisors (12180724297011).

21100301331021 is a wasteful number, since it uses less digits than its factorization.

21100301331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51394 (or 51391 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21100301331021 its reverse (12013310300112), we get a palindrome (33113611631133).

The spelling of 21100301331021 in words is "twenty-one trillion, one hundred billion, three hundred one million, three hundred thirty-one thousand, twenty-one".