121343251 has 4 divisors (see below), whose sum is σ = 121402792. Its totient is φ = 121283712.

The previous prime is 121343227. The next prime is 121343273. The reversal of 121343251 is 152343121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121343251 - 2¹¹ = 121341203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121343281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26601 + ... + 30826.

It is an arithmetic number, because the mean of its divisors is an integer number (30350698).

Almost surely, 2^121343251 is an apocalyptic number.

121343251 is a deficient number, since it is larger than the sum of its proper divisors (59541).

121343251 is an equidigital number, since it uses as much as digits as its factorization.

121343251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59540.

The product of its digits is 720, while the sum is 22.

The square root of 121343251 is about 11015.5912687427. The cubic root of 121343251 is about 495.0760023422.

Adding to 121343251 its reverse (152343121), we get a palindrome (273686372).

The spelling of 121343251 in words is "one hundred twenty-one million, three hundred forty-three thousand, two hundred fifty-one".