11233011021 has 4 divisors (see below), whose sum is σ = 14977348032. Its totient is φ = 7488674012.

The previous prime is 11233011017. The next prime is 11233011029. The reversal of 11233011021 is 12011033211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11233011021 - 2² = 11233011017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11233011029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872168501 + ... + 1872168506.

It is an arithmetic number, because the mean of its divisors is an integer number (3744337008).

Almost surely, 2^11233011021 is an apocalyptic number.

It is an amenable number.

11233011021 is a deficient number, since it is larger than the sum of its proper divisors (3744337011).

11233011021 is an equidigital number, since it uses as much as digits as its factorization.

11233011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3744337010.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11233011021 its reverse (12011033211), we get a palindrome (23244044232).

The spelling of 11233011021 in words is "eleven billion, two hundred thirty-three million, eleven thousand, twenty-one".