23240211221 has 2 divisors, whose sum is σ = 23240211222. Its totient is φ = 23240211220.

The previous prime is 23240211167. The next prime is 23240211263. The reversal of 23240211221 is 12211204232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22950735025 + 289476196 = 151495^2 + 17014^2 .

It is a cyclic number.

It is not a de Polignac number, because 23240211221 - 2¹⁰ = 23240210197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23240211193 and 23240211202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23240211121) 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, 11620105610 + 11620105611.

It is an arithmetic number, because the mean of its divisors is an integer number (11620105611).

Almost surely, 2^23240211221 is an apocalyptic number.

It is an amenable number.

23240211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23240211221 is an equidigital number, since it uses as much as digits as its factorization.

23240211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 23240211221 its reverse (12211204232), we get a palindrome (35451415453).

The spelling of 23240211221 in words is "twenty-three billion, two hundred forty million, two hundred eleven thousand, two hundred twenty-one".