121135247 has 2 divisors, whose sum is σ = 121135248. Its totient is φ = 121135246.

The previous prime is 121135193. The next prime is 121135253. The reversal of 121135247 is 742531121.

It is a strong prime.

It is an emirp because it is prime and its reverse (742531121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121135247 - 2⁸ = 121134991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121138247) 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 as a sum of consecutive naturals, namely, 60567623 + 60567624.

It is an arithmetic number, because the mean of its divisors is an integer number (60567624).

Almost surely, 2^121135247 is an apocalyptic number.

121135247 is a deficient number, since it is larger than the sum of its proper divisors (1).

121135247 is an equidigital number, since it uses as much as digits as its factorization.

121135247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 121135247 is about 11006.1458740106. The cubic root of 121135247 is about 494.7929576602.

Adding to 121135247 its reverse (742531121), we get a palindrome (863666368).

The spelling of 121135247 in words is "one hundred twenty-one million, one hundred thirty-five thousand, two hundred forty-seven".