2123117828080 has 80 divisors (see below), whose sum is σ = 4942833325920. Its totient is φ = 848115081216.

The previous prime is 2123117828033. The next prime is 2123117828089. The reversal of 2123117828080 is 808287113212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×2123117828080² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123117828089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290555787 + ... + 290563093.

It is an arithmetic number, because the mean of its divisors is an integer number (61785416574).

Almost surely, 2^{2123117828080} is an apocalyptic number.

2123117828080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123117828080 is an abundant number, since it is smaller than the sum of its proper divisors (2819715497840).

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

2123117828080 is a wasteful number, since it uses less digits than its factorization.

2123117828080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11666 (or 11660 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 43.

The spelling of 2123117828080 in words is "two trillion, one hundred twenty-three billion, one hundred seventeen million, eight hundred twenty-eight thousand, eighty".