31120233212 has 6 divisors (see below), whose sum is σ = 54460408128. Its totient is φ = 15560116604.

The previous prime is 31120233211. The next prime is 31120233223. The reversal of 31120233212 is 21233202113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120233211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3890029148 + ... + 3890029155.

It is an arithmetic number, because the mean of its divisors is an integer number (9076734688).

Almost surely, 2^31120233212 is an apocalyptic number.

It is an amenable number.

31120233212 is a deficient number, since it is larger than the sum of its proper divisors (23340174916).

31120233212 is a wasteful number, since it uses less digits than its factorization.

31120233212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780058307 (or 7780058305 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31120233212 its reverse (21233202113), we get a palindrome (52353435325).

The spelling of 31120233212 in words is "thirty-one billion, one hundred twenty million, two hundred thirty-three thousand, two hundred twelve".