311322213012 has 24 divisors (see below), whose sum is σ = 727314226912. Its totient is φ = 103646109600.

The previous prime is 311322213011. The next prime is 311322213019. The reversal of 311322213012 is 210312223113.

It is a super-2 number, since 2×311322213012² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311322213012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311322213011) 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, 15985039 + ... + 16004502.

Almost surely, 2^311322213012 is an apocalyptic number.

It is an amenable number.

311322213012 is an abundant number, since it is smaller than the sum of its proper divisors (415992013900).

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

311322213012 is a wasteful number, since it uses less digits than its factorization.

311322213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31990359 (or 31990357 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311322213012 its reverse (210312223113), we get a palindrome (521634436125).

The spelling of 311322213012 in words is "three hundred eleven billion, three hundred twenty-two million, two hundred thirteen thousand, twelve".