311242135212 has 72 divisors (see below), whose sum is σ = 788611443984. Its totient is φ = 103502318976.

The previous prime is 311242135159. The next prime is 311242135223. The reversal of 311242135212 is 212531242113.

It is a happy number.

311242135212 is a `hidden beast` number, since 3 + 1 + 124 + 2 + 13 + 521 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32271663 + ... + 32281305.

It is an arithmetic number, because the mean of its divisors is an integer number (10952936722).

Almost surely, 2^311242135212 is an apocalyptic number.

It is an amenable number.

311242135212 is an abundant number, since it is smaller than the sum of its proper divisors (477369308772).

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

311242135212 is a wasteful number, since it uses less digits than its factorization.

311242135212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11679 (or 11674 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

Adding to 311242135212 its reverse (212531242113), we get a palindrome (523773377325).

The spelling of 311242135212 in words is "three hundred eleven billion, two hundred forty-two million, one hundred thirty-five thousand, two hundred twelve".