31212311113000 has 32 divisors (see below), whose sum is σ = 73036808006760. Its totient is φ = 12484924444800.

The previous prime is 31212311112991. The next prime is 31212311113001. The reversal of 31212311113000 is 31111321213.

It can be written as a sum of positive squares in 4 ways, for example, as 8886516012676 + 22325795100324 = 2981026^2 + 4725018^2 .

It is not an unprimeable number, because it can be changed into a prime (31212311113001) 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, 15606154557 + ... + 15606156556.

Almost surely, 2^{31212311113000} is an apocalyptic number.

It is an amenable number.

31212311113000 is an abundant number, since it is smaller than the sum of its proper divisors (41824496893760).

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

31212311113000 is a wasteful number, since it uses less digits than its factorization.

31212311113000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31212311134 (or 31212311120 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31212311113000 its reverse (31111321213), we get a palindrome (31243422434213).

The spelling of 31212311113000 in words is "thirty-one trillion, two hundred twelve billion, three hundred eleven million, one hundred thirteen thousand".