21023122233 has 24 divisors (see below), whose sum is σ = 29790734688. Its totient is φ = 13141813632.

The previous prime is 21023122213. The next prime is 21023122247. The reversal of 21023122233 is 33222132012.

It is a happy number.

It is not a de Polignac number, because 21023122233 - 2¹⁴ = 21023105849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21023122213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4081966 + ... + 4087112.

It is an arithmetic number, because the mean of its divisors is an integer number (1241280612).

Almost surely, 2^21023122233 is an apocalyptic number.

It is an amenable number.

21023122233 is a deficient number, since it is larger than the sum of its proper divisors (8767612455).

21023122233 is an equidigital number, since it uses as much as digits as its factorization.

21023122233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5733 (or 5450 counting only the distinct ones).

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

Adding to 21023122233 its reverse (33222132012), we get a palindrome (54245254245).

The spelling of 21023122233 in words is "twenty-one billion, twenty-three million, one hundred twenty-two thousand, two hundred thirty-three".