201220120120100 has 72 divisors (see below), whose sum is σ = 459635354892000. Its totient is φ = 76250800051200.

The previous prime is 201220120120027. The next prime is 201220120120127. The reversal of 201220120120100 is 1021021022102.

It is a super-2 number, since 2×201220120120100² (a number of 29 digits) contains 22 as substring.

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, 147328340 + ... + 148687860.

It is an arithmetic number, because the mean of its divisors is an integer number (6383824373500).

Almost surely, 2^{201220120120100} is an apocalyptic number.

201220120120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220120120100 is an abundant number, since it is smaller than the sum of its proper divisors (258415234771900).

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

201220120120100 is a wasteful number, since it uses less digits than its factorization.

201220120120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437453 (or 1437446 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201220120120100 its reverse (1021021022102), we get a palindrome (202241141142202).

The spelling of 201220120120100 in words is "two hundred one trillion, two hundred twenty billion, one hundred twenty million, one hundred twenty thousand, one hundred".