222121221985 has 32 divisors (see below), whose sum is σ = 291528179712. Its totient is φ = 161486161920.

The previous prime is 222121221977. The next prime is 222121222019. The reversal of 222121221985 is 589122121222.

It is not a de Polignac number, because 222121221985 - 2³ = 222121221977 is a prime.

It is a super-2 number, since 2×222121221985² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1112032 + ... + 1296478.

It is an arithmetic number, because the mean of its divisors is an integer number (9110255616).

Almost surely, 2^222121221985 is an apocalyptic number.

It is an amenable number.

222121221985 is a deficient number, since it is larger than the sum of its proper divisors (69406957727).

222121221985 is a wasteful number, since it uses less digits than its factorization.

222121221985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184753.

The product of its digits is 23040, while the sum is 37.

The spelling of 222121221985 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, nine hundred eighty-five".