222221200122121 has 16 divisors (see below), whose sum is σ = 233279953920000. Its totient is φ = 211405665834000.

The previous prime is 222221200122043. The next prime is 222221200122137. The reversal of 222221200122121 is 121221002122222.

222221200122121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 222221200122121 - 2²⁷ = 222221065904393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222221200122092 and 222221200122101.

It is not an unprimeable number, because it can be changed into a prime (222221200122821) 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, 196879630 + ... + 198005128.

It is an arithmetic number, because the mean of its divisors is an integer number (14579997120000).

Almost surely, 2^{222221200122121} is an apocalyptic number.

It is an amenable number.

222221200122121 is a deficient number, since it is larger than the sum of its proper divisors (11058753797879).

222221200122121 is a wasteful number, since it uses less digits than its factorization.

222221200122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233540.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222221200122121 its reverse (121221002122222), we get a palindrome (343442202244343).

The spelling of 222221200122121 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred million, one hundred twenty-two thousand, one hundred twenty-one".