311122202020 has 48 divisors (see below), whose sum is σ = 746979488640. Its totient is φ = 106629583104.

The previous prime is 311122201991. The next prime is 311122202023. The reversal of 311122202020 is 20202221113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 311122201985 and 311122202003.

It is not an unprimeable number, because it can be changed into a prime (311122202023) 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, 58210 + ... + 790969.

It is an arithmetic number, because the mean of its divisors is an integer number (15562072680).

Almost surely, 2^311122202020 is an apocalyptic number.

It is an amenable number.

311122202020 is an abundant number, since it is smaller than the sum of its proper divisors (435857286620).

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

311122202020 is a wasteful number, since it uses less digits than its factorization.

311122202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851812 (or 851810 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 311122202020 its reverse (20202221113), we get a palindrome (331324423133).

The spelling of 311122202020 in words is "three hundred eleven billion, one hundred twenty-two million, two hundred two thousand, twenty".