31322121212112 has 80 divisors (see below), whose sum is σ = 82919125336320. Its totient is φ = 10183688505856.

The previous prime is 31322121212033. The next prime is 31322121212119. The reversal of 31322121212112 is 21121212122313.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322121212119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23031687 + ... + 24353702.

It is an arithmetic number, because the mean of its divisors is an integer number (1036489066704).

Almost surely, 2^{31322121212112} is an apocalyptic number.

It is an amenable number.

31322121212112 is an abundant number, since it is smaller than the sum of its proper divisors (51597004124208).

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

31322121212112 is a wasteful number, since it uses less digits than its factorization.

31322121212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47385740 (or 47385734 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

Adding to 31322121212112 its reverse (21121212122313), we get a palindrome (52443333334425).

The spelling of 31322121212112 in words is "thirty-one trillion, three hundred twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twelve".