23122613221 has 2 divisors, whose sum is σ = 23122613222. Its totient is φ = 23122613220.

The previous prime is 23122613203. The next prime is 23122613233. The reversal of 23122613221 is 12231622132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19974168900 + 3148444321 = 141330^2 + 56111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23122613221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23122613251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561306610 + 11561306611.

It is an arithmetic number, because the mean of its divisors is an integer number (11561306611).

Almost surely, 2^23122613221 is an apocalyptic number.

It is an amenable number.

23122613221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23122613221 is an equidigital number, since it uses as much as digits as its factorization.

23122613221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The spelling of 23122613221 in words is "twenty-three billion, one hundred twenty-two million, six hundred thirteen thousand, two hundred twenty-one".