23122042421 has 2 divisors, whose sum is σ = 23122042422. Its totient is φ = 23122042420.

The previous prime is 23122042409. The next prime is 23122042453. The reversal of 23122042421 is 12424022132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13465049521 + 9656992900 = 116039^2 + 98270^2 .

It is a cyclic number.

It is not a de Polignac number, because 23122042421 - 2²⁶ = 23054933557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23122042481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561021210 + 11561021211.

It is an arithmetic number, because the mean of its divisors is an integer number (11561021211).

Almost surely, 2^23122042421 is an apocalyptic number.

It is an amenable number.

23122042421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23122042421 is an equidigital number, since it uses as much as digits as its factorization.

23122042421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 23122042421 its reverse (12424022132), we get a palindrome (35546064553).

The spelling of 23122042421 in words is "twenty-three billion, one hundred twenty-two million, forty-two thousand, four hundred twenty-one".