311133213212 has 12 divisors (see below), whose sum is σ = 545592053496. Its totient is φ = 155249769360.

The previous prime is 311133213179. The next prime is 311133213217. The reversal of 311133213212 is 212312331113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311133213217) 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, 79207103 + ... + 79211030.

It is an arithmetic number, because the mean of its divisors is an integer number (45466004458).

Almost surely, 2^311133213212 is an apocalyptic number.

It is an amenable number.

311133213212 is a deficient number, since it is larger than the sum of its proper divisors (234458840284).

311133213212 is a wasteful number, since it uses less digits than its factorization.

311133213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158418628 (or 158418626 counting only the distinct ones).

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

Adding to 311133213212 its reverse (212312331113), we get a palindrome (523445544325).

The spelling of 311133213212 in words is "three hundred eleven billion, one hundred thirty-three million, two hundred thirteen thousand, two hundred twelve".