424121231 has 2 divisors, whose sum is σ = 424121232. Its totient is φ = 424121230.

The previous prime is 424121221. The next prime is 424121237. The reversal of 424121231 is 132121424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424121231 is a prime.

It is a super-2 number, since 2×424121231² = 359757637169910722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424121237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212060615 + 212060616.

It is an arithmetic number, because the mean of its divisors is an integer number (212060616).

Almost surely, 2^424121231 is an apocalyptic number.

424121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

424121231 is an equidigital number, since it uses as much as digits as its factorization.

424121231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 424121231 is about 20594.2038204928. The cubic root of 424121231 is about 751.3287443795.

Adding to 424121231 its reverse (132121424), we get a palindrome (556242655).

The spelling of 424121231 in words is "four hundred twenty-four million, one hundred twenty-one thousand, two hundred thirty-one".