11018481921 has 24 divisors (see below), whose sum is σ = 16522300704. Its totient is φ = 7337977920.

The previous prime is 11018481899. The next prime is 11018481941. The reversal of 11018481921 is 12918481011.

It is not a de Polignac number, because 11018481921 - 2¹¹ = 11018479873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11018481941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214206 + ... + 260616.

It is an arithmetic number, because the mean of its divisors is an integer number (688429196).

Almost surely, 2^11018481921 is an apocalyptic number.

It is an amenable number.

11018481921 is a deficient number, since it is larger than the sum of its proper divisors (5503818783).

11018481921 is an frugal number, since it uses more digits than its factorization.

11018481921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47403 (or 47391 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The spelling of 11018481921 in words is "eleven billion, eighteen million, four hundred eighty-one thousand, nine hundred twenty-one".