121412399 has 4 divisors (see below), whose sum is σ = 125328960. Its totient is φ = 117495840.

The previous prime is 121412393. The next prime is 121412411. The reversal of 121412399 is 993214121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993214121 = 9787 ⋅101483.

It is a cyclic number.

It is not a de Polignac number, because 121412399 - 2¹² = 121408303 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 (121412393) 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, 1958234 + ... + 1958295.

It is an arithmetic number, because the mean of its divisors is an integer number (31332240).

Almost surely, 2^121412399 is an apocalyptic number.

121412399 is a deficient number, since it is larger than the sum of its proper divisors (3916561).

121412399 is an equidigital number, since it uses as much as digits as its factorization.

121412399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916560.

The product of its digits is 3888, while the sum is 32.

The square root of 121412399 is about 11018.7294639627. The cubic root of 121412399 is about 495.1700249172.

The spelling of 121412399 in words is "one hundred twenty-one million, four hundred twelve thousand, three hundred ninety-nine".