2121102222020 has 48 divisors (see below), whose sum is σ = 4648344236928. Its totient is φ = 811488648960.

The previous prime is 2121102221981. The next prime is 2121102222059. The reversal of 2121102222020 is 202222011212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121102221981) and next prime (2121102222059).

It is a self number, because there is not a number n which added to its sum of digits gives 2121102222020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5929040 + ... + 6276600.

It is an arithmetic number, because the mean of its divisors is an integer number (96840504936).

Almost surely, 2^{2121102222020} is an apocalyptic number.

2121102222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121102222020 is an abundant number, since it is smaller than the sum of its proper divisors (2527242014908).

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

2121102222020 is a wasteful number, since it uses less digits than its factorization.

2121102222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360860 (or 360858 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2121102222020 its reverse (202222011212), we get a palindrome (2323324233232).

The spelling of 2121102222020 in words is "two trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-two thousand, twenty".