11980621128 has 192 divisors, whose sum is σ = 36115200000. Its totient is φ = 3300006528.

The previous prime is 11980621117. The next prime is 11980621183. The reversal of 11980621128 is 82112608911.

It is a super-2 number, since 2×11980621128² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3993373 + ... + 3996371.

It is an arithmetic number, because the mean of its divisors is an integer number (188100000).

Almost surely, 2^11980621128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11980621128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18057600000).

11980621128 is an abundant number, since it is smaller than the sum of its proper divisors (24134578872).

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

11980621128 is a wasteful number, since it uses less digits than its factorization.

11980621128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144 (or 3133 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 39.

The spelling of 11980621128 in words is "eleven billion, nine hundred eighty million, six hundred twenty-one thousand, one hundred twenty-eight".