311322013012 has 12 divisors (see below), whose sum is σ = 563600196180. Its totient is φ = 150293385536.

The previous prime is 311322012997. The next prime is 311322013019. The reversal of 311322013012 is 210310223113.

It can be written as a sum of positive squares in 2 ways, for example, as 237818127556 + 73503885456 = 487666^2 + 271116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311322013019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1341905113 + ... + 1341905344.

It is an arithmetic number, because the mean of its divisors is an integer number (46966683015).

Almost surely, 2^311322013012 is an apocalyptic number.

It is an amenable number.

311322013012 is a deficient number, since it is larger than the sum of its proper divisors (252278183168).

311322013012 is a wasteful number, since it uses less digits than its factorization.

311322013012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683810490 (or 2683810488 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 311322013012 its reverse (210310223113), we get a palindrome (521632236125).

The spelling of 311322013012 in words is "three hundred eleven billion, three hundred twenty-two million, thirteen thousand, twelve".