311440042322212 has 48 divisors (see below), whose sum is σ = 563024852974080. Its totient is φ = 150655837151232.

The previous prime is 311440042322179. The next prime is 311440042322219. The reversal of 311440042322212 is 212223240044113.

It is a super-2 number, since 2×311440042322212² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (311440042322219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5122228 + ... + 25477780.

It is an arithmetic number, because the mean of its divisors is an integer number (11729684436960).

Almost surely, 2^{311440042322212} is an apocalyptic number.

It is an amenable number.

311440042322212 is a deficient number, since it is larger than the sum of its proper divisors (251584810651868).

311440042322212 is a wasteful number, since it uses less digits than its factorization.

311440042322212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20356540 (or 20356538 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 311440042322212 its reverse (212223240044113), we get a palindrome (523663282366325).

The spelling of 311440042322212 in words is "three hundred eleven trillion, four hundred forty billion, forty-two million, three hundred twenty-two thousand, two hundred twelve".