121432999 has 2 divisors, whose sum is σ = 121433000. Its totient is φ = 121432998.

The previous prime is 121432981. The next prime is 121433029. The reversal of 121432999 is 999234121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121432999 - 2¹¹ = 121430951 is a prime.

It is a super-2 number, since 2×121432999² = 29491946492268002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121432919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60716499 + 60716500.

It is an arithmetic number, because the mean of its divisors is an integer number (60716500).

Almost surely, 2^121432999 is an apocalyptic number.

121432999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121432999 is an equidigital number, since it uses as much as digits as its factorization.

121432999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 121432999 is about 11019.6641963356. The cubic root of 121432999 is about 495.1980284428.

The spelling of 121432999 in words is "one hundred twenty-one million, four hundred thirty-two thousand, nine hundred ninety-nine".