221022012010121 has 12 divisors (see below), whose sum is σ = 258956930831760. Its totient is φ = 188084507645160.

The previous prime is 221022012010073. The next prime is 221022012010187. The reversal of 221022012010121 is 121010210220122.

It is not a de Polignac number, because 221022012010121 - 2²⁶ = 221021944901257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221022012010121.

It is not an unprimeable number, because it can be changed into a prime (221022012015121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16225364795 + ... + 16225378416.

It is an arithmetic number, because the mean of its divisors is an integer number (21579744235980).

Almost surely, 2^{221022012010121} is an apocalyptic number.

It is an amenable number.

221022012010121 is a deficient number, since it is larger than the sum of its proper divisors (37934918821639).

221022012010121 is a wasteful number, since it uses less digits than its factorization.

221022012010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32450743364 (or 32450743357 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221022012010121 its reverse (121010210220122), we get a palindrome (342032222230243).

The spelling of 221022012010121 in words is "two hundred twenty-one trillion, twenty-two billion, twelve million, ten thousand, one hundred twenty-one".