222221201121 has 12 divisors (see below), whose sum is σ = 321003521748. Its totient is φ = 148139463264.

The previous prime is 222221201101. The next prime is 222221201141. The reversal of 222221201121 is 121102122222.

It is a happy number.

222221201121 is a `hidden beast` number, since 222 + 221 + 201 + 1 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (222221201101) and next prime (222221201141).

It can be written as a sum of positive squares in 2 ways, for example, as 150431501025 + 71789700096 = 387855^2 + 267936^2 .

It is not a de Polignac number, because 222221201121 - 2⁵ = 222221201089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222221201094 and 222221201103.

It is not an unprimeable number, because it can be changed into a prime (222221201101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488670 + ... + 826583.

It is an arithmetic number, because the mean of its divisors is an integer number (26750293479).

Almost surely, 2^222221201121 is an apocalyptic number.

It is an amenable number.

222221201121 is a deficient number, since it is larger than the sum of its proper divisors (98782320627).

222221201121 is a wasteful number, since it uses less digits than its factorization.

222221201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334032 (or 1334029 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222221201121 its reverse (121102122222), we get a palindrome (343323323343).

The spelling of 222221201121 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred one thousand, one hundred twenty-one".