21202113123100 has 72 divisors (see below), whose sum is σ = 56625951380768. Its totient is φ = 6710119315200.

The previous prime is 21202113123029. The next prime is 21202113123137. The reversal of 21202113123100 is 132131120212.

It is a super-2 number, since 2×21202113123100² (a number of 27 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 (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1164942171 + ... + 1164960370.

Almost surely, 2^{21202113123100} is an apocalyptic number.

21202113123100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202113123100 is an abundant number, since it is smaller than the sum of its proper divisors (35423838257668).

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

21202113123100 is a wasteful number, since it uses less digits than its factorization.

21202113123100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329902575 (or 2329902568 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21202113123100 its reverse (132131120212), we get a palindrome (21334244243312).

The spelling of 21202113123100 in words is "twenty-one trillion, two hundred two billion, one hundred thirteen million, one hundred twenty-three thousand, one hundred".