100021200002100 has 216 divisors, whose sum is σ = 337635908981280. Its totient is φ = 24619961975040.

The previous prime is 100021200002063. The next prime is 100021200002111. The reversal of 100021200002100 is 1200002120001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 577179667 + ... + 577352933.

Almost surely, 2^{100021200002100} is an apocalyptic number.

100021200002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021200002100 is an abundant number, since it is smaller than the sum of its proper divisors (237614708979180).

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

100021200002100 is a wasteful number, since it uses less digits than its factorization.

100021200002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222639 (or 222629 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100021200002100 its reverse (1200002120001), we get a palindrome (101221202122101).

The spelling of 100021200002100 in words is "one hundred trillion, twenty-one billion, two hundred million, two thousand, one hundred".