3111122221020 has 144 divisors (see below), whose sum is σ = 10295847001440. Its totient is φ = 754148390400.

The previous prime is 3111122220979. The next prime is 3111122221033. The reversal of 3111122221020 is 201222211113.

3111122221020 is a `hidden beast` number, since 311 + 1 + 122 + 2 + 210 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3111122220984 and 3111122221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26292790 + ... + 26410850.

It is an arithmetic number, because the mean of its divisors is an integer number (71498937510).

Almost surely, 2^{3111122221020} is an apocalyptic number.

3111122221020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3111122221020 is an abundant number, since it is smaller than the sum of its proper divisors (7184724780420).

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

3111122221020 is a wasteful number, since it uses less digits than its factorization.

3111122221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131396 (or 131391 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 3111122221020 its reverse (201222211113), we get a palindrome (3312344432133).

The spelling of 3111122221020 in words is "three trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty".