311121333212 has 12 divisors (see below), whose sum is σ = 545120697240. Its totient is φ = 155372562576.

The previous prime is 311121333191. The next prime is 311121333277. The reversal of 311121333212 is 212333121113.

It is a super-2 number, since 2×311121333212² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47022287 + ... + 47028902.

It is an arithmetic number, because the mean of its divisors is an integer number (45426724770).

Almost surely, 2^311121333212 is an apocalyptic number.

It is an amenable number.

311121333212 is a deficient number, since it is larger than the sum of its proper divisors (233999364028).

311121333212 is a wasteful number, since it uses less digits than its factorization.

311121333212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94052020 (or 94052018 counting only the distinct ones).

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

Adding to 311121333212 its reverse (212333121113), we get a palindrome (523454454325).

The spelling of 311121333212 in words is "three hundred eleven billion, one hundred twenty-one million, three hundred thirty-three thousand, two hundred twelve".