121136399 has 2 divisors, whose sum is σ = 121136400. Its totient is φ = 121136398.

The previous prime is 121136383. The next prime is 121136453. The reversal of 121136399 is 993631121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121136399 - 2⁴ = 121136383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121136299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60568199 + 60568200.

It is an arithmetic number, because the mean of its divisors is an integer number (60568200).

Almost surely, 2^121136399 is an apocalyptic number.

121136399 is a deficient number, since it is larger than the sum of its proper divisors (1).

121136399 is an equidigital number, since it uses as much as digits as its factorization.

121136399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 121136399 is about 11006.1982082825. The cubic root of 121136399 is about 494.7945261541.

The spelling of 121136399 in words is "one hundred twenty-one million, one hundred thirty-six thousand, three hundred ninety-nine".