222100221122121 has 16 divisors (see below), whose sum is σ = 296532136883840. Its totient is φ = 147867606673920.

The previous prime is 222100221122111. The next prime is 222100221122141. The reversal of 222100221122121 is 121221122001222.

It is not a de Polignac number, because 222100221122121 - 2⁵ = 222100221122089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222100221122111) 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, 13069881 + ... + 24799641.

It is an arithmetic number, because the mean of its divisors is an integer number (18533258555240).

Almost surely, 2^{222100221122121} is an apocalyptic number.

It is an amenable number.

222100221122121 is a deficient number, since it is larger than the sum of its proper divisors (74431915761719).

222100221122121 is a wasteful number, since it uses less digits than its factorization.

222100221122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11738256.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222100221122121 its reverse (121221122001222), we get a palindrome (343321343123343).

The spelling of 222100221122121 in words is "two hundred twenty-two trillion, one hundred billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".