23033312221 has 4 divisors (see below), whose sum is σ = 23044813632. Its totient is φ = 23021810812.

The previous prime is 23033312177. The next prime is 23033312233. The reversal of 23033312221 is 12221333032.

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 a de Polignac number, because none of the positive numbers 2^k-23033312221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23033312192 and 23033312201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23033312251) 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, 5747701 + ... + 5751706.

It is an arithmetic number, because the mean of its divisors is an integer number (5761203408).

Almost surely, 2^23033312221 is an apocalyptic number.

It is an amenable number.

23033312221 is a deficient number, since it is larger than the sum of its proper divisors (11501411).

23033312221 is a wasteful number, since it uses less digits than its factorization.

23033312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11501410.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 23033312221 its reverse (12221333032), we get a palindrome (35254645253).

The spelling of 23033312221 in words is "twenty-three billion, thirty-three million, three hundred twelve thousand, two hundred twenty-one".