221101202111121 has 16 divisors (see below), whose sum is σ = 328156161595200. Its totient is φ = 147131330097024.

The previous prime is 221101202111113. The next prime is 221101202111159. The reversal of 221101202111121 is 121111202101122.

It is a happy number.

221101202111121 is a `hidden beast` number, since 2 + 211 + 0 + 120 + 211 + 1 + 121 = 666.

It is not a de Polignac number, because 221101202111121 - 2³ = 221101202111113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221101202111094 and 221101202111103.

It is not an unprimeable number, because it can be changed into a prime (221101202111161) 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, 7485299136 + ... + 7485328673.

It is an arithmetic number, because the mean of its divisors is an integer number (20509760099700).

Almost surely, 2^{221101202111121} is an apocalyptic number.

It is an amenable number.

221101202111121 is a deficient number, since it is larger than the sum of its proper divisors (107054959484079).

221101202111121 is a wasteful number, since it uses less digits than its factorization.

221101202111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14970628365 (or 14970628359 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221101202111121 its reverse (121111202101122), we get a palindrome (342212404212243).

Subtracting from 221101202111121 its reverse (121111202101122), we obtain a palindrome (99990000009999).

The spelling of 221101202111121 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred two million, one hundred eleven thousand, one hundred twenty-one".