31212212322 has 64 divisors (see below), whose sum is σ = 64809448704. Its totient is φ = 10013310720.

The previous prime is 31212212293. The next prime is 31212212357. The reversal of 31212212322 is 22321221213.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7913883 + ... + 7917825.

It is an arithmetic number, because the mean of its divisors is an integer number (1012647636).

Almost surely, 2^31212212322 is an apocalyptic number.

31212212322 is an abundant number, since it is smaller than the sum of its proper divisors (33597236382).

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

31212212322 is a wasteful number, since it uses less digits than its factorization.

31212212322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363.

The product of its digits is 576, while the sum is 21.

Adding to 31212212322 its reverse (22321221213), we get a palindrome (53533433535).

The spelling of 31212212322 in words is "thirty-one billion, two hundred twelve million, two hundred twelve thousand, three hundred twenty-two".