121136397 has 4 divisors (see below), whose sum is σ = 161515200. Its totient is φ = 80757596.

The previous prime is 121136383. The next prime is 121136399. The reversal of 121136397 is 793631121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121136397 - 2¹⁸ = 120874253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121136399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20189397 + ... + 20189402.

It is an arithmetic number, because the mean of its divisors is an integer number (40378800).

Almost surely, 2^121136397 is an apocalyptic number.

It is an amenable number.

121136397 is a deficient number, since it is larger than the sum of its proper divisors (40378803).

121136397 is an equidigital number, since it uses as much as digits as its factorization.

121136397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40378802.

The product of its digits is 6804, while the sum is 33.

The square root of 121136397 is about 11006.1981174246. The cubic root of 121136397 is about 494.7945234310.

The spelling of 121136397 in words is "one hundred twenty-one million, one hundred thirty-six thousand, three hundred ninety-seven".