31213111202322 has 128 divisors (see below), whose sum is σ = 75832203110400. Its totient is φ = 8366592384000.

The previous prime is 31213111202311. The next prime is 31213111202323. The reversal of 31213111202322 is 22320211131213.

It is a junction number, because it is equal to n+sod(n) for n = 31213111202292 and 31213111202301.

It is not an unprimeable number, because it can be changed into a prime (31213111202323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33971572 + ... + 34878272.

It is an arithmetic number, because the mean of its divisors is an integer number (592439086800).

Almost surely, 2^{31213111202322} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31213111202322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37916101555200).

31213111202322 is an abundant number, since it is smaller than the sum of its proper divisors (44619091908078).

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

31213111202322 is a wasteful number, since it uses less digits than its factorization.

31213111202322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907152.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31213111202322 its reverse (22320211131213), we get a palindrome (53533322333535).

The spelling of 31213111202322 in words is "thirty-one trillion, two hundred thirteen billion, one hundred eleven million, two hundred two thousand, three hundred twenty-two".