121430421 has 20 divisors (see below), whose sum is σ = 207310752. Its totient is φ = 69388488.

The previous prime is 121430383. The next prime is 121430423. The reversal of 121430421 is 124034121.

121430421 is a `hidden beast` number, since 1 + 214 + 30 + 421 = 666.

It is not a de Polignac number, because 121430421 - 2⁶ = 121430357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121430394 and 121430403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430423) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 106515 + ... + 107648.

Almost surely, 2^121430421 is an apocalyptic number.

It is an amenable number.

121430421 is a deficient number, since it is larger than the sum of its proper divisors (85880331).

121430421 is an equidigital number, since it uses as much as digits as its factorization.

121430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214182 (or 214173 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121430421 is about 11019.5472230033. The cubic root of 121430421 is about 495.1945240973.

Adding to 121430421 its reverse (124034121), we get a palindrome (245464542).

The spelling of 121430421 in words is "one hundred twenty-one million, four hundred thirty thousand, four hundred twenty-one".