311131332212 has 48 divisors (see below), whose sum is σ = 575080699200. Its totient is φ = 147077441280.

The previous prime is 311131332137. The next prime is 311131332217. The reversal of 311131332212 is 212233131113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311131332217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044887 + ... + 1309217.

It is an arithmetic number, because the mean of its divisors is an integer number (11980847900).

Almost surely, 2^311131332212 is an apocalyptic number.

It is an amenable number.

311131332212 is a deficient number, since it is larger than the sum of its proper divisors (263949366988).

311131332212 is a wasteful number, since it uses less digits than its factorization.

311131332212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264576 (or 264574 counting only the distinct ones).

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

Adding to 311131332212 its reverse (212233131113), we get a palindrome (523364463325).

The spelling of 311131332212 in words is "three hundred eleven billion, one hundred thirty-one million, three hundred thirty-two thousand, two hundred twelve".