21021100100102 has 16 divisors (see below), whose sum is σ = 33730643343600. Its totient is φ = 9790300105728.

The previous prime is 21021100100093. The next prime is 21021100100129. The reversal of 21021100100102 is 20100100112012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3186943352 + ... + 3186949947.

It is an arithmetic number, because the mean of its divisors is an integer number (2108165208975).

Almost surely, 2^{21021100100102} is an apocalyptic number.

21021100100102 is a deficient number, since it is larger than the sum of its proper divisors (12709543243498).

21021100100102 is a wasteful number, since it uses less digits than its factorization.

21021100100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373893415.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21021100100102 its reverse (20100100112012), we get a palindrome (41121200212114).

The spelling of 21021100100102 in words is "twenty-one trillion, twenty-one billion, one hundred million, one hundred thousand, one hundred two".