23021212223 has 4 divisors (see below), whose sum is σ = 23023864920. Its totient is φ = 23018559528.

The previous prime is 23021212211. The next prime is 23021212271. The reversal of 23021212223 is 32221212032.

It is a happy number.

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-23021212223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23021212195 and 23021212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021212723) 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, 1313288 + ... + 1330701.

It is an arithmetic number, because the mean of its divisors is an integer number (5755966230).

Almost surely, 2^23021212223 is an apocalyptic number.

23021212223 is a deficient number, since it is larger than the sum of its proper divisors (2652697).

23021212223 is an equidigital number, since it uses as much as digits as its factorization.

23021212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652696.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 23021212223 its reverse (32221212032), we get a palindrome (55242424255).

The spelling of 23021212223 in words is "twenty-three billion, twenty-one million, two hundred twelve thousand, two hundred twenty-three".