311311230212 has 24 divisors (see below), whose sum is σ = 556898248704. Its totient is φ = 152203542912.

The previous prime is 311311230169. The next prime is 311311230247. The reversal of 311311230212 is 212032113113.

It is a happy number.

It is a super-2 number, since 2×311311230212² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557333 + ... + 966044.

It is an arithmetic number, because the mean of its divisors is an integer number (23204093696).

Almost surely, 2^311311230212 is an apocalyptic number.

It is an amenable number.

311311230212 is a deficient number, since it is larger than the sum of its proper divisors (245587018492).

311311230212 is a wasteful number, since it uses less digits than its factorization.

311311230212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524515 (or 1524513 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311311230212 its reverse (212032113113), we get a palindrome (523343343325).

The spelling of 311311230212 in words is "three hundred eleven billion, three hundred eleven million, two hundred thirty thousand, two hundred twelve".