222131122221 has 16 divisors (see below), whose sum is σ = 297230782464. Its totient is φ = 147559593024.

The previous prime is 222131122219. The next prime is 222131122231. The reversal of 222131122221 is 122221131222.

222131122221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222131122221 - 2¹ = 222131122219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222131122231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7409955 + ... + 7439871.

It is an arithmetic number, because the mean of its divisors is an integer number (18576923904).

Almost surely, 2^222131122221 is an apocalyptic number.

It is an amenable number.

222131122221 is a deficient number, since it is larger than the sum of its proper divisors (75099660243).

222131122221 is a wasteful number, since it uses less digits than its factorization.

222131122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38660.

The product of its digits is 384, while the sum is 21.

Adding to 222131122221 its reverse (122221131222), we get a palindrome (344352253443).

Subtracting from 222131122221 its reverse (122221131222), we obtain a palindrome (99909990999).

The spelling of 222131122221 in words is "two hundred twenty-two billion, one hundred thirty-one million, one hundred twenty-two thousand, two hundred twenty-one".