11929192921 has 16 divisors (see below), whose sum is σ = 12804704640. Its totient is φ = 11080627200.

The previous prime is 11929192909. The next prime is 11929192939. The reversal of 11929192921 is 12929192911.

It is a cyclic number.

It is not a de Polignac number, because 11929192921 - 2⁵ = 11929192889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11929192981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167481 + ... + 227833.

It is an arithmetic number, because the mean of its divisors is an integer number (800294040).

Almost surely, 2^11929192921 is an apocalyptic number.

It is an amenable number.

11929192921 is a deficient number, since it is larger than the sum of its proper divisors (875511719).

11929192921 is a wasteful number, since it uses less digits than its factorization.

11929192921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60576.

The product of its digits is 52488, while the sum is 46.

It can be divided in two parts, 119291 and 92921, that added together give a palindrome (212212).

The spelling of 11929192921 in words is "eleven billion, nine hundred twenty-nine million, one hundred ninety-two thousand, nine hundred twenty-one".