121442247 has 10 divisors (see below), whose sum is σ = 181413848. Its totient is φ = 80961444.

The previous prime is 121442213. The next prime is 121442263. The reversal of 121442247 is 742244121.

It is not a de Polignac number, because 121442247 - 2⁶ = 121442183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121442247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 749563 + ... + 749724.

Almost surely, 2^121442247 is an apocalyptic number.

121442247 is a deficient number, since it is larger than the sum of its proper divisors (59971601).

121442247 is an equidigital number, since it uses as much as digits as its factorization.

121442247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499299 (or 1499290 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 121442247 is about 11020.0838018592. The cubic root of 121442247 is about 495.2105990926.

Adding to 121442247 its reverse (742244121), we get a palindrome (863686368).

The spelling of 121442247 in words is "one hundred twenty-one million, four hundred forty-two thousand, two hundred forty-seven".