121225399 has 2 divisors, whose sum is σ = 121225400. Its totient is φ = 121225398.

The previous prime is 121225393. The next prime is 121225411. The reversal of 121225399 is 993522121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121225399 - 2⁷ = 121225271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121225393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60612699 + 60612700.

It is an arithmetic number, because the mean of its divisors is an integer number (60612700).

Almost surely, 2^121225399 is an apocalyptic number.

121225399 is a deficient number, since it is larger than the sum of its proper divisors (1).

121225399 is an equidigital number, since it uses as much as digits as its factorization.

121225399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 121225399 is about 11010.2406422385. The cubic root of 121225399 is about 494.9156731500.

The spelling of 121225399 in words is "one hundred twenty-one million, two hundred twenty-five thousand, three hundred ninety-nine".