423042121 has 2 divisors, whose sum is σ = 423042122. Its totient is φ = 423042120.

The previous prime is 423042091. The next prime is 423042133. The reversal of 423042121 is 121240324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422878096 + 164025 = 20564^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 423042121 - 2¹³ = 423033929 is a prime.

It is a super-2 number, since 2×423042121² = 357929272280357282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423042181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211521060 + 211521061.

It is an arithmetic number, because the mean of its divisors is an integer number (211521061).

Almost surely, 2^423042121 is an apocalyptic number.

It is an amenable number.

423042121 is a deficient number, since it is larger than the sum of its proper divisors (1).

423042121 is an equidigital number, since it uses as much as digits as its factorization.

423042121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 423042121 is about 20567.9877722640. The cubic root of 423042121 is about 750.6909904400.

Adding to 423042121 its reverse (121240324), we get a palindrome (544282445).

The spelling of 423042121 in words is "four hundred twenty-three million, forty-two thousand, one hundred twenty-one".