23133132221 has 2 divisors, whose sum is σ = 23133132222. Its totient is φ = 23133132220.

The previous prime is 23133132181. The next prime is 23133132247. The reversal of 23133132221 is 12223133132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22233792100 + 899340121 = 149110^2 + 29989^2 .

It is a cyclic number.

It is not a de Polignac number, because 23133132221 - 2¹⁸ = 23132870077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23133132521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11566566110 + 11566566111.

It is an arithmetic number, because the mean of its divisors is an integer number (11566566111).

Almost surely, 2^23133132221 is an apocalyptic number.

It is an amenable number.

23133132221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23133132221 is an equidigital number, since it uses as much as digits as its factorization.

23133132221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

Adding to 23133132221 its reverse (12223133132), we get a palindrome (35356265353).

The spelling of 23133132221 in words is "twenty-three billion, one hundred thirty-three million, one hundred thirty-two thousand, two hundred twenty-one".