21015301132100 has 72 divisors (see below), whose sum is σ = 50687608785408. Its totient is φ = 7497740348800.

The previous prime is 21015301132037. The next prime is 21015301132129. The reversal of 21015301132100 is 123110351012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180175844 + ... + 180292443.

It is an arithmetic number, because the mean of its divisors is an integer number (703994566464).

Almost surely, 2^{21015301132100} is an apocalyptic number.

21015301132100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21015301132100 is an abundant number, since it is smaller than the sum of its proper divisors (29672307653308).

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

21015301132100 is a wasteful number, since it uses less digits than its factorization.

21015301132100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360468365 (or 360468358 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 21015301132100 its reverse (123110351012), we get a palindrome (21138411483112).

The spelling of 21015301132100 in words is "twenty-one trillion, fifteen billion, three hundred one million, one hundred thirty-two thousand, one hundred".