222210121021 has 12 divisors (see below), whose sum is σ = 260905118688. Its totient is φ = 188685759192.

The previous prime is 222210120991. The next prime is 222210121027. The reversal of 222210121021 is 120121012222.

It is a happy number.

It is not a de Polignac number, because 222210121021 - 2⁷ = 222210120893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222210120986 and 222210121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222210121027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21185881 + ... + 21196366.

It is an arithmetic number, because the mean of its divisors is an integer number (21742093224).

Almost surely, 2^222210121021 is an apocalyptic number.

It is an amenable number.

222210121021 is a deficient number, since it is larger than the sum of its proper divisors (38694997667).

222210121021 is a wasteful number, since it uses less digits than its factorization.

222210121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42382368 (or 42382361 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222210121021 its reverse (120121012222), we get a palindrome (342331133243).

The spelling of 222210121021 in words is "two hundred twenty-two billion, two hundred ten million, one hundred twenty-one thousand, twenty-one".