31212130331322 has 160 divisors (see below), whose sum is σ = 71385528614400. Its totient is φ = 10190111133312.

The previous prime is 31212130331321. The next prime is 31212130331323. The reversal of 31212130331322 is 22313303121213.

31212130331322 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 2 + 1 + 3 + 0 + 331 + 322 = 666.

It is an interprime number because it is at equal distance from previous prime (31212130331321) and next prime (31212130331323).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31212130331321) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3766392663 + ... + 3766400949.

It is an arithmetic number, because the mean of its divisors is an integer number (446159553840).

Almost surely, 2^{31212130331322} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31212130331322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35692764307200).

31212130331322 is an abundant number, since it is smaller than the sum of its proper divisors (40173398283078).

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

31212130331322 is a wasteful number, since it uses less digits than its factorization.

31212130331322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9762 (or 9753 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31212130331322 its reverse (22313303121213), we get a palindrome (53525433452535).

The spelling of 31212130331322 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirty million, three hundred thirty-one thousand, three hundred twenty-two".