311121332220 has 96 divisors (see below), whose sum is σ = 879013900800. Its totient is φ = 82219104000.

The previous prime is 311121332209. The next prime is 311121332227. The reversal of 311121332220 is 22233121113.

It is a super-2 number, since 2×311121332220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311121332227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2945034 + ... + 3048846.

It is an arithmetic number, because the mean of its divisors is an integer number (9156394800).

Almost surely, 2^311121332220 is an apocalyptic number.

311121332220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311121332220 is an abundant number, since it is smaller than the sum of its proper divisors (567892568580).

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

311121332220 is a wasteful number, since it uses less digits than its factorization.

311121332220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104275 (or 104273 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311121332220 its reverse (22233121113), we get a palindrome (333354453333).

The spelling of 311121332220 in words is "three hundred eleven billion, one hundred twenty-one million, three hundred thirty-two thousand, two hundred twenty".