2121120123020 has 24 divisors (see below), whose sum is σ = 4493771309664. Its totient is φ = 840939658496.

The previous prime is 2121120122999. The next prime is 2121120123049. The reversal of 2121120123020 is 203210211212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121120123020.

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, 469272104 + ... + 469276623.

It is an arithmetic number, because the mean of its divisors is an integer number (187240471236).

Almost surely, 2^{2121120123020} is an apocalyptic number.

2121120123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121120123020 is an abundant number, since it is smaller than the sum of its proper divisors (2372651186644).

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

2121120123020 is a wasteful number, since it uses less digits than its factorization.

2121120123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938548849 (or 938548847 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2121120123020 its reverse (203210211212), we get a palindrome (2324330334232).

The spelling of 2121120123020 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty-three thousand, twenty".