121043399 has 2 divisors, whose sum is σ = 121043400. Its totient is φ = 121043398.

The previous prime is 121043393. The next prime is 121043401. The reversal of 121043399 is 993340121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121043399 is a prime.

Together with 121043401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121043393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60521699 + 60521700.

It is an arithmetic number, because the mean of its divisors is an integer number (60521700).

Almost surely, 2^121043399 is an apocalyptic number.

121043399 is a deficient number, since it is larger than the sum of its proper divisors (1).

121043399 is an equidigital number, since it uses as much as digits as its factorization.

121043399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 121043399 is about 11001.9725049647. The cubic root of 121043399 is about 494.6678709339.

The spelling of 121043399 in words is "one hundred twenty-one million, forty-three thousand, three hundred ninety-nine".