121430431 has 4 divisors (see below), whose sum is σ = 121453672. Its totient is φ = 121407192.

The previous prime is 121430423. The next prime is 121430459. The reversal of 121430431 is 134034121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134034121 = 13 ⋅10310317.

It is a cyclic number.

It is not a de Polignac number, because 121430431 - 2³ = 121430423 is a prime.

It is a super-2 number, since 2×121430431² = 29490699145691522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121430399 and 121430408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280 + ... + 15586.

It is an arithmetic number, because the mean of its divisors is an integer number (30363418).

Almost surely, 2^121430431 is an apocalyptic number.

121430431 is a deficient number, since it is larger than the sum of its proper divisors (23241).

121430431 is an equidigital number, since it uses as much as digits as its factorization.

121430431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23240.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 121430431 is about 11019.5476767425. The cubic root of 121430431 is about 495.1945376906.

Adding to 121430431 its reverse (134034121), we get a palindrome (255464552).

The spelling of 121430431 in words is "one hundred twenty-one million, four hundred thirty thousand, four hundred thirty-one".