11133234021 has 32 divisors (see below), whose sum is σ = 18291723520. Its totient is φ = 5865467904.

The previous prime is 11133233999. The next prime is 11133234037. The reversal of 11133234021 is 12043233111.

It is not a de Polignac number, because 11133234021 - 2⁹ = 11133233509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133234061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208965 + ... + 256773.

It is an arithmetic number, because the mean of its divisors is an integer number (571616360).

Almost surely, 2^11133234021 is an apocalyptic number.

It is an amenable number.

11133234021 is a deficient number, since it is larger than the sum of its proper divisors (7158489499).

11133234021 is a wasteful number, since it uses less digits than its factorization.

11133234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48685.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 11133234021 its reverse (12043233111), we get a palindrome (23176467132).

The spelling of 11133234021 in words is "eleven billion, one hundred thirty-three million, two hundred thirty-four thousand, twenty-one".