2121025043320 has 128 divisors (see below), whose sum is σ = 4921382188800. Its totient is φ = 822327607296.

The previous prime is 2121025043303. The next prime is 2121025043321. The reversal of 2121025043320 is 233405201212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121025043321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117000097 + ... + 117018223.

It is an arithmetic number, because the mean of its divisors is an integer number (38448298350).

Almost surely, 2^{2121025043320} is an apocalyptic number.

2121025043320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121025043320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2460691094400).

2121025043320 is an abundant number, since it is smaller than the sum of its proper divisors (2800357145480).

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

2121025043320 is a wasteful number, since it uses less digits than its factorization.

2121025043320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18857 (or 18853 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 2121025043320 in words is "two trillion, one hundred twenty-one billion, twenty-five million, forty-three thousand, three hundred twenty".