23423411213221 has 2 divisors, whose sum is σ = 23423411213222. Its totient is φ = 23423411213220.

The previous prime is 23423411213219. The next prime is 23423411213263. The reversal of 23423411213221 is 12231211432432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20656797750625 + 2766613462596 = 4544975^2 + 1663314^2 .

It is a cyclic number.

It is not a de Polignac number, because 23423411213221 - 2¹ = 23423411213219 is a prime.

Together with 23423411213219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23424411213221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11711705606610 + 11711705606611.

It is an arithmetic number, because the mean of its divisors is an integer number (11711705606611).

Almost surely, 2^{23423411213221} is an apocalyptic number.

It is an amenable number.

23423411213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23423411213221 is an equidigital number, since it uses as much as digits as its factorization.

23423411213221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

Adding to 23423411213221 its reverse (12231211432432), we get a palindrome (35654622645653).

The spelling of 23423411213221 in words is "twenty-three trillion, four hundred twenty-three billion, four hundred eleven million, two hundred thirteen thousand, two hundred twenty-one".