11941113921 has 64 divisors (see below), whose sum is σ = 18490429440. Its totient is φ = 6785856000.

The previous prime is 11941113883. The next prime is 11941113929. The reversal of 11941113921 is 12931114911.

It is not a de Polignac number, because 11941113921 - 2¹¹ = 11941111873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11941113929) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10632666 + ... + 10633788.

It is an arithmetic number, because the mean of its divisors is an integer number (288912960).

Almost surely, 2^11941113921 is an apocalyptic number.

11941113921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11941113921 is a deficient number, since it is larger than the sum of its proper divisors (6549315519).

11941113921 is a wasteful number, since it uses less digits than its factorization.

11941113921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478.

The product of its digits is 1944, while the sum is 33.

The spelling of 11941113921 in words is "eleven billion, nine hundred forty-one million, one hundred thirteen thousand, nine hundred twenty-one".