31122003312 has 60 divisors (see below), whose sum is σ = 90101788920. Its totient is φ = 10016275584.

The previous prime is 31122003239. The next prime is 31122003361. The reversal of 31122003312 is 21330022113.

31122003312 is a `hidden beast` number, since 311 + 2 + 20 + 0 + 331 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3722118 + ... + 3730469.

It is an arithmetic number, because the mean of its divisors is an integer number (1501696482).

Almost surely, 2^31122003312 is an apocalyptic number.

It is an amenable number.

31122003312 is an abundant number, since it is smaller than the sum of its proper divisors (58979785608).

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

31122003312 is a wasteful number, since it uses less digits than its factorization.

31122003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452630 (or 7452621 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31122003312 its reverse (21330022113), we get a palindrome (52452025425).

The spelling of 31122003312 in words is "thirty-one billion, one hundred twenty-two million, three thousand, three hundred twelve".