311103212 has 12 divisors (see below), whose sum is σ = 622206480. Its totient is φ = 133329936.

The previous prime is 311103211. The next prime is 311103223. The reversal of 311103212 is 212301113.

311103212 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (311103211) 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, 5555387 + ... + 5555442.

It is an arithmetic number, because the mean of its divisors is an integer number (51850540).

Almost surely, 2^311103212 is an apocalyptic number.

It is an amenable number.

311103212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

311103212 is a wasteful number, since it uses less digits than its factorization.

311103212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110840 (or 11110838 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 311103212 is about 17638.1181535900. The cubic root of 311103212 is about 677.5918364273.

Adding to 311103212 its reverse (212301113), we get a palindrome (523404325).

The spelling of 311103212 in words is "three hundred eleven million, one hundred three thousand, two hundred twelve".