21222332023 has 4 divisors (see below), whose sum is σ = 21285306640. Its totient is φ = 21159357408.

The previous prime is 21222332003. The next prime is 21222332039. The reversal of 21222332023 is 32023322212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222332023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222331985 and 21222332003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222332003) 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, 31486803 + ... + 31487476.

It is an arithmetic number, because the mean of its divisors is an integer number (5321326660).

Almost surely, 2^21222332023 is an apocalyptic number.

21222332023 is a deficient number, since it is larger than the sum of its proper divisors (62974617).

21222332023 is an equidigital number, since it uses as much as digits as its factorization.

21222332023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62974616.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21222332023 its reverse (32023322212), we get a palindrome (53245654235).

The spelling of 21222332023 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty-two thousand, twenty-three".