121430999 has 6 divisors (see below), whose sum is σ = 125475480. Its totient is φ = 117512940.

The previous prime is 121430993. The next prime is 121431019. The reversal of 121430999 is 999034121.

It is not a de Polignac number, because 121430999 - 2¹⁶ = 121365463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62219 + ... + 64140.

It is an arithmetic number, because the mean of its divisors is an integer number (20912580).

Almost surely, 2^121430999 is an apocalyptic number.

121430999 is a deficient number, since it is larger than the sum of its proper divisors (4044481).

121430999 is an equidigital number, since it uses as much as digits as its factorization.

121430999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126421 (or 126390 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 121430999 is about 11019.5734490950. The cubic root of 121430999 is about 495.1953097927.

The spelling of 121430999 in words is "one hundred twenty-one million, four hundred thirty thousand, nine hundred ninety-nine".