311222213312 has 56 divisors (see below), whose sum is σ = 633919504320. Its totient is φ = 151543773440.

The previous prime is 311222213303. The next prime is 311222213321. The reversal of 311222213312 is 213312222113.

It is an interprime number because it is at equal distance from previous prime (311222213303) and next prime (311222213321).

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, 18887 + ... + 789177.

Almost surely, 2^311222213312 is an apocalyptic number.

311222213312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311222213312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316959752160).

311222213312 is an abundant number, since it is smaller than the sum of its proper divisors (322697291008).

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

311222213312 is a wasteful number, since it uses less digits than its factorization.

311222213312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770469 (or 770459 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 311222213312 its reverse (213312222113), we get a palindrome (524534435425).

The spelling of 311222213312 in words is "three hundred eleven billion, two hundred twenty-two million, two hundred thirteen thousand, three hundred twelve".