311331123212 has 24 divisors (see below), whose sum is σ = 551013029280. Its totient is φ = 153899222400.

The previous prime is 311331123203. The next prime is 311331123263. The reversal of 311331123212 is 212321133113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3480593 + ... + 3568919.

It is an arithmetic number, because the mean of its divisors is an integer number (22958876220).

Almost surely, 2^311331123212 is an apocalyptic number.

It is an amenable number.

311331123212 is a deficient number, since it is larger than the sum of its proper divisors (239681906068).

311331123212 is a wasteful number, since it uses less digits than its factorization.

311331123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98321 (or 98319 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

Adding to 311331123212 its reverse (212321133113), we get a palindrome (523652256325).

Subtracting from 311331123212 its reverse (212321133113), we obtain a palindrome (99009990099).

The spelling of 311331123212 in words is "three hundred eleven billion, three hundred thirty-one million, one hundred twenty-three thousand, two hundred twelve".