311214301220 has 24 divisors (see below), whose sum is σ = 653614242624. Its totient is φ = 124473490016.

The previous prime is 311214301193. The next prime is 311214301267. The reversal of 311214301220 is 22103412113.

It is a super-3 number, since 3×311214301220³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 311214301192 and 311214301201.

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, 554342 + ... + 964221.

It is an arithmetic number, because the mean of its divisors is an integer number (27233926776).

Almost surely, 2^311214301220 is an apocalyptic number.

It is an amenable number.

311214301220 is an abundant number, since it is smaller than the sum of its proper divisors (342399941404).

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

311214301220 is a wasteful number, since it uses less digits than its factorization.

311214301220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528819 (or 1528817 counting only the distinct ones).

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

Adding to 311214301220 its reverse (22103412113), we get a palindrome (333317713333).

The spelling of 311214301220 in words is "three hundred eleven billion, two hundred fourteen million, three hundred one thousand, two hundred twenty".