321222522112 has 36 divisors (see below), whose sum is σ = 653288225940. Its totient is φ = 157580853248.

The previous prime is 321222522091. The next prime is 321222522113. The reversal of 321222522112 is 211225222123.

It can be written as a sum of positive squares in 2 ways, for example, as 270716252416 + 50506269696 = 520304^2 + 224736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321222522113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11823937 + ... + 11851072.

It is an arithmetic number, because the mean of its divisors is an integer number (18146895165).

Almost surely, 2^321222522112 is an apocalyptic number.

321222522112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321222522112 is an abundant number, since it is smaller than the sum of its proper divisors (332065703828).

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

321222522112 is an equidigital number, since it uses as much as digits as its factorization.

321222522112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23675078 (or 23675064 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

Adding to 321222522112 its reverse (211225222123), we get a palindrome (532447744235).

The spelling of 321222522112 in words is "three hundred twenty-one billion, two hundred twenty-two million, five hundred twenty-two thousand, one hundred twelve".