11931212580 has 96 divisors (see below), whose sum is σ = 39067843584. Its totient is φ = 2663708544.

The previous prime is 11931212483. The next prime is 11931212581. The reversal of 11931212580 is 8521213911.

It is not an unprimeable number, because it can be changed into a prime (11931212581) 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, 312262 + ... + 348381.

It is an arithmetic number, because the mean of its divisors is an integer number (406956704).

Almost surely, 2^11931212580 is an apocalyptic number.

11931212580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11931212580 is an abundant number, since it is smaller than the sum of its proper divisors (27136631004).

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

11931212580 is a wasteful number, since it uses less digits than its factorization.

11931212580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660705 (or 660703 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 33.

The spelling of 11931212580 in words is "eleven billion, nine hundred thirty-one million, two hundred twelve thousand, five hundred eighty".