2102120185980 has 192 divisors, whose sum is σ = 6118576128000. Its totient is φ = 538674935040.

The previous prime is 2102120185939. The next prime is 2102120186027. The reversal of 2102120185980 is 895810212012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 193577791 + ... + 193588649.

It is an arithmetic number, because the mean of its divisors is an integer number (31867584000).

Almost surely, 2^{2102120185980} is an apocalyptic number.

2102120185980 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 2102120185980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3059288064000).

2102120185980 is an abundant number, since it is smaller than the sum of its proper divisors (4016455942020).

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

2102120185980 is a wasteful number, since it uses less digits than its factorization.

2102120185980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11624 (or 11622 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 39.

Adding to 2102120185980 its reverse (895810212012), we get a palindrome (2997930397992).

The spelling of 2102120185980 in words is "two trillion, one hundred two billion, one hundred twenty million, one hundred eighty-five thousand, nine hundred eighty".