222221112112121 has 16 divisors (see below), whose sum is σ = 227986586786304. Its totient is φ = 216500996726784.

The previous prime is 222221112112093. The next prime is 222221112112123. The reversal of 222221112112121 is 121211211122222.

It is a cyclic number.

It is not a de Polignac number, because 222221112112121 - 2¹⁴ = 222221112095737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222221112112123) 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, 2033645 + ... + 21179658.

It is an arithmetic number, because the mean of its divisors is an integer number (14249161674144).

Almost surely, 2^{222221112112121} is an apocalyptic number.

It is an amenable number.

222221112112121 is a deficient number, since it is larger than the sum of its proper divisors (5765474674183).

222221112112121 is a wasteful number, since it uses less digits than its factorization.

222221112112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23214280.

The product of its digits is 256, while the sum is 23.

Adding to 222221112112121 its reverse (121211211122222), we get a palindrome (343432323234343).

The spelling of 222221112112121 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-one".