31132011012 has 24 divisors (see below), whose sum is σ = 72645232800. Its totient is φ = 10376783616.

The previous prime is 31132011007. The next prime is 31132011013. The reversal of 31132011012 is 21011023113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31132010982 and 31132011000.

It is not an unprimeable number, because it can be changed into a prime (31132011013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210439 + ... + 326417.

It is an arithmetic number, because the mean of its divisors is an integer number (3026884700).

Almost surely, 2^31132011012 is an apocalyptic number.

It is an amenable number.

31132011012 is an abundant number, since it is smaller than the sum of its proper divisors (41513221788).

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

31132011012 is a wasteful number, since it uses less digits than its factorization.

31132011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138355 (or 138353 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31132011012 its reverse (21011023113), we get a palindrome (52143034125).

The spelling of 31132011012 in words is "thirty-one billion, one hundred thirty-two million, eleven thousand, twelve".