423401322121 has 2 divisors, whose sum is σ = 423401322122. Its totient is φ = 423401322120.

The previous prime is 423401322077. The next prime is 423401322137. The reversal of 423401322121 is 121223104324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269709880896 + 153691441225 = 519336^2 + 392035^2 .

It is a cyclic number.

It is not a de Polignac number, because 423401322121 - 2¹⁷ = 423401191049 is a prime.

It is not a weakly prime, because it can be changed into another prime (423401322821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211700661060 + 211700661061.

It is an arithmetic number, because the mean of its divisors is an integer number (211700661061).

Almost surely, 2^423401322121 is an apocalyptic number.

It is an amenable number.

423401322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

423401322121 is an equidigital number, since it uses as much as digits as its factorization.

423401322121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 423401322121 its reverse (121223104324), we get a palindrome (544624426445).

The spelling of 423401322121 in words is "four hundred twenty-three billion, four hundred one million, three hundred twenty-two thousand, one hundred twenty-one".