311040312212 has 48 divisors (see below), whose sum is σ = 655674096000. Its totient is φ = 126122655744.

The previous prime is 311040312211. The next prime is 311040312217. The reversal of 311040312212 is 212213040113.

It is a super-3 number, since 3×311040312212³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311040312211) by changing a digit.

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, 28964 + ... + 789252.

It is an arithmetic number, because the mean of its divisors is an integer number (13659877000).

Almost surely, 2^311040312212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311040312212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327837048000).

311040312212 is an abundant number, since it is smaller than the sum of its proper divisors (344633783788).

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

311040312212 is a wasteful number, since it uses less digits than its factorization.

311040312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761088 (or 761086 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 311040312212 its reverse (212213040113), we get a palindrome (523253352325).

The spelling of 311040312212 in words is "three hundred eleven billion, forty million, three hundred twelve thousand, two hundred twelve".