231212222022 has 16 divisors (see below), whose sum is σ = 462444206832. Its totient is φ = 77067446880.

The previous prime is 231212222011. The next prime is 231212222027. The reversal of 231212222022 is 220222212132.

It is a super-2 number, since 2×231212222022² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231212222022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231212222027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669133 + ... + 954024.

It is an arithmetic number, because the mean of its divisors is an integer number (28902762927).

Almost surely, 2^231212222022 is an apocalyptic number.

231212222022 is an abundant number, since it is smaller than the sum of its proper divisors (231231984810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231212222022 is a wasteful number, since it uses less digits than its factorization.

231212222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646903.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 231212222022 its reverse (220222212132), we get a palindrome (451434434154).

The spelling of 231212222022 in words is "two hundred thirty-one billion, two hundred twelve million, two hundred twenty-two thousand, twenty-two".