23601993221 has 2 divisors, whose sum is σ = 23601993222. Its totient is φ = 23601993220.

The previous prime is 23601993187. The next prime is 23601993223. The reversal of 23601993221 is 12239910632.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22933770721 + 668222500 = 151439^2 + 25850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23601993221 is a prime.

Together with 23601993223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23601993223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11800996610 + 11800996611.

It is an arithmetic number, because the mean of its divisors is an integer number (11800996611).

Almost surely, 2^23601993221 is an apocalyptic number.

It is an amenable number.

23601993221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23601993221 is an equidigital number, since it uses as much as digits as its factorization.

23601993221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 23601993221 in words is "twenty-three billion, six hundred one million, nine hundred ninety-three thousand, two hundred twenty-one".