424120121 has 2 divisors, whose sum is σ = 424120122. Its totient is φ = 424120120.

The previous prime is 424120093. The next prime is 424120127. The reversal of 424120121 is 121021424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365383225 + 58736896 = 19115^2 + 7664^2 .

It is a cyclic number.

It is not a de Polignac number, because 424120121 - 2²² = 419925817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 424120121.

It is not a weakly prime, because it can be changed into another prime (424120127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212060060 + 212060061.

It is an arithmetic number, because the mean of its divisors is an integer number (212060061).

Almost surely, 2^424120121 is an apocalyptic number.

It is an amenable number.

424120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

424120121 is an equidigital number, since it uses as much as digits as its factorization.

424120121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 424120121 is about 20594.1768711449. The cubic root of 424120121 is about 751.3280889257.

Adding to 424120121 its reverse (121021424), we get a palindrome (545141545).

The spelling of 424120121 in words is "four hundred twenty-four million, one hundred twenty thousand, one hundred twenty-one".