121276399 has 2 divisors, whose sum is σ = 121276400. Its totient is φ = 121276398.

The previous prime is 121276387. The next prime is 121276427. The reversal of 121276399 is 993672121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121276399 - 2⁵ = 121276367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121276369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60638199 + 60638200.

It is an arithmetic number, because the mean of its divisors is an integer number (60638200).

Almost surely, 2^121276399 is an apocalyptic number.

121276399 is a deficient number, since it is larger than the sum of its proper divisors (1).

121276399 is an equidigital number, since it uses as much as digits as its factorization.

121276399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 121276399 is about 11012.5564243730. The cubic root of 121276399 is about 494.9850677399.

The spelling of 121276399 in words is "one hundred twenty-one million, two hundred seventy-six thousand, three hundred ninety-nine".