31020120233212 has 48 divisors (see below), whose sum is σ = 59417218143360. Its totient is φ = 14053158936000.

The previous prime is 31020120233197. The next prime is 31020120233213. The reversal of 31020120233212 is 21233202102013.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020120233213) 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, 218610087 + ... + 218751937.

It is an arithmetic number, because the mean of its divisors is an integer number (1237858711320).

Almost surely, 2^{31020120233212} is an apocalyptic number.

It is an amenable number.

31020120233212 is a deficient number, since it is larger than the sum of its proper divisors (28397097910148).

31020120233212 is a wasteful number, since it uses less digits than its factorization.

31020120233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158362 (or 158360 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31020120233212 its reverse (21233202102013), we get a palindrome (52253322335225).

The spelling of 31020120233212 in words is "thirty-one trillion, twenty billion, one hundred twenty million, two hundred thirty-three thousand, two hundred twelve".