100021002100 has 36 divisors (see below), whose sum is σ = 218702439648. Its totient is φ = 39702988000.

The previous prime is 100021002097. The next prime is 100021002113. The reversal of 100021002100 is 1200120001.

It is a super-2 number, since 2×100021002100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3804496 + ... + 3830695.

It is an arithmetic number, because the mean of its divisors is an integer number (6075067768).

Almost surely, 2^100021002100 is an apocalyptic number.

100021002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021002100 is an abundant number, since it is smaller than the sum of its proper divisors (118681437548).

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

100021002100 is a wasteful number, since it uses less digits than its factorization.

100021002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635336 (or 7635329 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 100021002100 its reverse (1200120001), we get a palindrome (101221122101).

The spelling of 100021002100 in words is "one hundred billion, twenty-one million, two thousand, one hundred".