12181291011 has 6 divisors (see below), whose sum is σ = 17595198140. Its totient is φ = 8120860668.

The previous prime is 12181290949. The next prime is 12181291013. The reversal of 12181291011 is 11019218121.

It is not a de Polignac number, because 12181291011 - 2¹⁰ = 12181289987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12181291013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 676738381 + ... + 676738398.

Almost surely, 2^12181291011 is an apocalyptic number.

12181291011 is a deficient number, since it is larger than the sum of its proper divisors (5413907129).

12181291011 is a wasteful number, since it uses less digits than its factorization.

12181291011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353476785 (or 1353476782 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 27.

The spelling of 12181291011 in words is "twelve billion, one hundred eighty-one million, two hundred ninety-one thousand, eleven".