121115247 has 16 divisors (see below), whose sum is σ = 177230592. Its totient is φ = 72960320.

The previous prime is 121115237. The next prime is 121115251. The reversal of 121115247 is 742511121.

It is a cyclic number.

It is not a de Polignac number, because 121115247 - 2⁴ = 121115231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121115207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5478 + ... + 16499.

It is an arithmetic number, because the mean of its divisors is an integer number (11076912).

Almost surely, 2^121115247 is an apocalyptic number.

121115247 is a deficient number, since it is larger than the sum of its proper divisors (56115345).

121115247 is a wasteful number, since it uses less digits than its factorization.

121115247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22158.

The product of its digits is 560, while the sum is 24.

The square root of 121115247 is about 11005.2372532354. The cubic root of 121115247 is about 494.7657252786.

Adding to 121115247 its reverse (742511121), we get a palindrome (863626368).

The spelling of 121115247 in words is "one hundred twenty-one million, one hundred fifteen thousand, two hundred forty-seven".