311311222212 has 48 divisors (see below), whose sum is σ = 769702106880. Its totient is φ = 97592581632.

The previous prime is 311311222207. The next prime is 311311222267. The reversal of 311311222212 is 212222113113.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304287 + ... + 845702.

It is an arithmetic number, because the mean of its divisors is an integer number (16035460560).

Almost surely, 2^311311222212 is an apocalyptic number.

It is an amenable number.

311311222212 is an abundant number, since it is smaller than the sum of its proper divisors (458390884668).

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

311311222212 is a wasteful number, since it uses less digits than its factorization.

311311222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151340 (or 1151338 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

Adding to 311311222212 its reverse (212222113113), we get a palindrome (523533335325).

The spelling of 311311222212 in words is "three hundred eleven billion, three hundred eleven million, two hundred twenty-two thousand, two hundred twelve".