12912409881 has 96 divisors (see below), whose sum is σ = 23135616000. Its totient is φ = 7089223680.

The previous prime is 12912409859. The next prime is 12912409883. The reversal of 12912409881 is 18890421921.

It is not a de Polignac number, because 12912409881 - 2¹⁰ = 12912408857 is a prime.

It is a super-2 number, since 2×12912409881² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12912409883) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6109881 + ... + 6111993.

It is an arithmetic number, because the mean of its divisors is an integer number (240996000).

Almost surely, 2^12912409881 is an apocalyptic number.

It is an amenable number.

12912409881 is a deficient number, since it is larger than the sum of its proper divisors (10223206119).

12912409881 is a wasteful number, since it uses less digits than its factorization.

12912409881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 12912409881 in words is "twelve billion, nine hundred twelve million, four hundred nine thousand, eight hundred eighty-one".