23033212221 has 16 divisors (see below), whose sum is σ = 30816599040. Its totient is φ = 15302742960.

The previous prime is 23033212219. The next prime is 23033212231. The reversal of 23033212221 is 12221233032.

It is a happy number.

It is not a de Polignac number, because 23033212221 - 2¹ = 23033212219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23033212231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1034476 + ... + 1056506.

It is an arithmetic number, because the mean of its divisors is an integer number (1926037440).

Almost surely, 2^23033212221 is an apocalyptic number.

It is an amenable number.

23033212221 is a deficient number, since it is larger than the sum of its proper divisors (7783386819).

23033212221 is a wasteful number, since it uses less digits than its factorization.

23033212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23216.

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

Adding to 23033212221 its reverse (12221233032), we get a palindrome (35254445253).

The spelling of 23033212221 in words is "twenty-three billion, thirty-three million, two hundred twelve thousand, two hundred twenty-one".