31212310122 has 80 divisors (see below), whose sum is σ = 79961523840. Its totient is φ = 8914279392.

The previous prime is 31212310117. The next prime is 31212310123. The reversal of 31212310122 is 22101321213.

31212310122 is a `hidden beast` number, since 312 + 1 + 231 + 0 + 122 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 31212310095 and 31212310104.

It is not an unprimeable number, because it can be changed into a prime (31212310123) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4540504 + ... + 4547372.

It is an arithmetic number, because the mean of its divisors is an integer number (999519048).

Almost surely, 2^31212310122 is an apocalyptic number.

31212310122 is an abundant number, since it is smaller than the sum of its proper divisors (48749213718).

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

31212310122 is a wasteful number, since it uses less digits than its factorization.

31212310122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10897 (or 10888 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31212310122 its reverse (22101321213), we get a palindrome (53313631335).

The spelling of 31212310122 in words is "thirty-one billion, two hundred twelve million, three hundred ten thousand, one hundred twenty-two".