201220110101121 has 16 divisors (see below), whose sum is σ = 268334924632320. Its totient is φ = 134126018862480.

The previous prime is 201220110101113. The next prime is 201220110101137. The reversal of 201220110101121 is 121101011022102.

It is a happy number.

It is not a de Polignac number, because 201220110101121 - 2³ = 201220110101113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201220110101121.

It is not an unprimeable number, because it can be changed into a prime (201220110101921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940160706 + ... + 940374708.

It is an arithmetic number, because the mean of its divisors is an integer number (16770932789520).

Almost surely, 2^{201220110101121} is an apocalyptic number.

It is an amenable number.

201220110101121 is a deficient number, since it is larger than the sum of its proper divisors (67114814531199).

201220110101121 is a wasteful number, since it uses less digits than its factorization.

201220110101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260956.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201220110101121 its reverse (121101011022102), we get a palindrome (322321121123223).

The spelling of 201220110101121 in words is "two hundred one trillion, two hundred twenty billion, one hundred ten million, one hundred one thousand, one hundred twenty-one".