222221221121210 has 16 divisors (see below), whose sum is σ = 404121890783016. Its totient is φ = 87972112278528.

The previous prime is 222221221121191. The next prime is 222221221121243. The reversal of 222221221121210 is 12121122122222.

It can be written as a sum of positive squares in 4 ways, for example, as 118593646385041 + 103627574736169 = 10890071^2 + 10179763^2 .

It is a super-2 number, since 2×222221221121210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114547020227 + ... + 114547022166.

Almost surely, 2^{222221221121210} is an apocalyptic number.

222221221121210 is a deficient number, since it is larger than the sum of its proper divisors (181900669661806).

222221221121210 is a wasteful number, since it uses less digits than its factorization.

222221221121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229094042497.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222221221121210 its reverse (12121122122222), we get a palindrome (234342343243432).

The spelling of 222221221121210 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".