122423111542421 has 2 divisors, whose sum is σ = 122423111542422. Its totient is φ = 122423111542420.

The previous prime is 122423111542411. The next prime is 122423111542423. The reversal of 122423111542421 is 124245111324221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106371149422321 + 16051962120100 = 10313639^2 + 4006490^2 .

It is a cyclic number.

It is not a de Polignac number, because 122423111542421 - 2⁶ = 122423111542357 is a prime.

Together with 122423111542423, 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 (122423111542423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61211555771210 + 61211555771211.

It is an arithmetic number, because the mean of its divisors is an integer number (61211555771211).

Almost surely, 2^{122423111542421} is an apocalyptic number.

It is an amenable number.

122423111542421 is a deficient number, since it is larger than the sum of its proper divisors (1).

122423111542421 is an equidigital number, since it uses as much as digits as its factorization.

122423111542421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 35.

Adding to 122423111542421 its reverse (124245111324221), we get a palindrome (246668222866642).

The spelling of 122423111542421 in words is "one hundred twenty-two trillion, four hundred twenty-three billion, one hundred eleven million, five hundred forty-two thousand, four hundred twenty-one".