121430423 has 2 divisors, whose sum is σ = 121430424. Its totient is φ = 121430422.

The previous prime is 121430383. The next prime is 121430459. The reversal of 121430423 is 324034121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121430423 - 2⁶ = 121430359 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 121430395 and 121430404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121430723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60715211 + 60715212.

It is an arithmetic number, because the mean of its divisors is an integer number (60715212).

Almost surely, 2^121430423 is an apocalyptic number.

121430423 is a deficient number, since it is larger than the sum of its proper divisors (1).

121430423 is an equidigital number, since it uses as much as digits as its factorization.

121430423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 121430423 is about 11019.5473137511. The cubic root of 121430423 is about 495.1945268159.

Adding to 121430423 its reverse (324034121), we get a palindrome (445464544).

The spelling of 121430423 in words is "one hundred twenty-one million, four hundred thirty thousand, four hundred twenty-three".