201121010002100 has 72 divisors (see below), whose sum is σ = 459421609197600. Its totient is φ = 76211145129600.

The previous prime is 201121010002091. The next prime is 201121010002123. The reversal of 201121010002100 is 1200010121102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44328095 + ... + 48654105.

It is an arithmetic number, because the mean of its divisors is an integer number (6380855683300).

Almost surely, 2^{201121010002100} is an apocalyptic number.

201121010002100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121010002100 is an abundant number, since it is smaller than the sum of its proper divisors (258300599195500).

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

201121010002100 is a wasteful number, since it uses less digits than its factorization.

201121010002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350513 (or 4350506 counting only the distinct ones).

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

Adding to 201121010002100 its reverse (1200010121102), we get a palindrome (202321020123202).

The spelling of 201121010002100 in words is "two hundred one trillion, one hundred twenty-one billion, ten million, two thousand, one hundred".