12021122020 has 24 divisors (see below), whose sum is σ = 25252012800. Its totient is φ = 4806990432.

The previous prime is 12021121997. The next prime is 12021122033. The reversal of 12021122020 is 2022112021.

It is a happy number.

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, 22290 + ... + 156649.

It is an arithmetic number, because the mean of its divisors is an integer number (1052167200).

Almost surely, 2^12021122020 is an apocalyptic number.

12021122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021122020 is an abundant number, since it is smaller than the sum of its proper divisors (13230890780).

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

12021122020 is a wasteful number, since it uses less digits than its factorization.

12021122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182307 (or 182305 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12021122020 its reverse (2022112021), we get a palindrome (14043234041).

Subtracting from 12021122020 its reverse (2022112021), we obtain a palindrome (9999009999).

The spelling of 12021122020 in words is "twelve billion, twenty-one million, one hundred twenty-two thousand, twenty".