201121100120 has 32 divisors (see below), whose sum is σ = 456915906720. Its totient is φ = 79667385600.

The previous prime is 201121100087. The next prime is 201121100153. The reversal of 201121100120 is 21001121102.

It is an interprime number because it is at equal distance from previous prime (201121100087) and next prime (201121100153).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24403781 + ... + 24412020.

It is an arithmetic number, because the mean of its divisors is an integer number (14278622085).

Almost surely, 2^201121100120 is an apocalyptic number.

201121100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121100120 is an abundant number, since it is smaller than the sum of its proper divisors (255794806600).

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

201121100120 is a wasteful number, since it uses less digits than its factorization.

201121100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48815915 (or 48815911 counting only the distinct ones).

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

Adding to 201121100120 its reverse (21001121102), we get a palindrome (222122221222).

The spelling of 201121100120 in words is "two hundred one billion, one hundred twenty-one million, one hundred thousand, one hundred twenty".