311201121212220 has 48 divisors (see below), whose sum is σ = 871364188241568. Its totient is φ = 82986865766400.

The previous prime is 311201121212159. The next prime is 311201121212263. The reversal of 311201121212220 is 22212121102113.

It is a super-2 number, since 2×311201121212220² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56576020 + ... + 61832420.

It is an arithmetic number, because the mean of its divisors is an integer number (18153420588366).

Almost surely, 2^{311201121212220} is an apocalyptic number.

311201121212220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311201121212220 is an abundant number, since it is smaller than the sum of its proper divisors (560163067029348).

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

311201121212220 is a wasteful number, since it uses less digits than its factorization.

311201121212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243150 (or 6243148 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 311201121212220 its reverse (22212121102113), we get a palindrome (333413242314333).

The spelling of 311201121212220 in words is "three hundred eleven trillion, two hundred one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty".