23220312133 has 2 divisors, whose sum is σ = 23220312134. Its totient is φ = 23220312132.

The previous prime is 23220312119. The next prime is 23220312139. The reversal of 23220312133 is 33121302232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12536609089 + 10683703044 = 111967^2 + 103362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23220312133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23220312139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610156066 + 11610156067.

It is an arithmetic number, because the mean of its divisors is an integer number (11610156067).

Almost surely, 2^23220312133 is an apocalyptic number.

It is an amenable number.

23220312133 is a deficient number, since it is larger than the sum of its proper divisors (1).

23220312133 is an equidigital number, since it uses as much as digits as its factorization.

23220312133 is an evil number, because the sum of its binary digits is even.

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

Adding to 23220312133 its reverse (33121302232), we get a palindrome (56341614365).

Subtracting 23220312133 from its reverse (33121302232), we obtain a palindrome (9900990099).

The spelling of 23220312133 in words is "twenty-three billion, two hundred twenty million, three hundred twelve thousand, one hundred thirty-three".