21100323313020 has 96 divisors (see below), whose sum is σ = 69345927479808. Its totient is φ = 4692581551872.

The previous prime is 21100323313001. The next prime is 21100323313021. The reversal of 21100323313020 is 2031332300112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100323313021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 678888042 + ... + 678919121.

It is an arithmetic number, because the mean of its divisors is an integer number (722353411248).

Almost surely, 2^{21100323313020} is an apocalyptic number.

21100323313020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100323313020 is an abundant number, since it is smaller than the sum of its proper divisors (48245604166788).

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

21100323313020 is a wasteful number, since it uses less digits than its factorization.

21100323313020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357807219 (or 1357807217 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21100323313020 its reverse (2031332300112), we get a palindrome (23131655613132).

The spelling of 21100323313020 in words is "twenty-one trillion, one hundred billion, three hundred twenty-three million, three hundred thirteen thousand, twenty".