21201233312100 has 216 divisors, whose sum is σ = 67996032850368. Its totient is φ = 5089741465600.

The previous prime is 21201233312053. The next prime is 21201233312153. The reversal of 21201233312100 is 121333210212.

It is a super-3 number, since 3×21201233312100³ (a number of 41 digits) contains 333 as substring.

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, 3321891 + ... + 7310090.

Almost surely, 2^{21201233312100} is an apocalyptic number.

21201233312100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201233312100 is an abundant number, since it is smaller than the sum of its proper divisors (46794799538268).

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

21201233312100 is a wasteful number, since it uses less digits than its factorization.

21201233312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632055 (or 10632031 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21201233312100 its reverse (121333210212), we get a palindrome (21322566522312).

The spelling of 21201233312100 in words is "twenty-one trillion, two hundred one billion, two hundred thirty-three million, three hundred twelve thousand, one hundred".