21120232233 has 4 divisors (see below), whose sum is σ = 28160309648. Its totient is φ = 14080154820.

The previous prime is 21120232187. The next prime is 21120232247. The reversal of 21120232233 is 33223202112.

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 not a de Polignac number, because 21120232233 - 2¹⁸ = 21119970089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120232283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3520038703 + ... + 3520038708.

It is an arithmetic number, because the mean of its divisors is an integer number (7040077412).

Almost surely, 2^21120232233 is an apocalyptic number.

It is an amenable number.

21120232233 is a deficient number, since it is larger than the sum of its proper divisors (7040077415).

21120232233 is an equidigital number, since it uses as much as digits as its factorization.

21120232233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040077414.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21120232233 its reverse (33223202112), we get a palindrome (54343434345).

The spelling of 21120232233 in words is "twenty-one billion, one hundred twenty million, two hundred thirty-two thousand, two hundred thirty-three".