121351247 has 2 divisors, whose sum is σ = 121351248. Its totient is φ = 121351246.

The previous prime is 121351213. The next prime is 121351261. The reversal of 121351247 is 742153121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121351247 - 2⁸ = 121350991 is a prime.

It is a super-2 number, since 2×121351247² = 29452250296910018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121351847) 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 as a sum of consecutive naturals, namely, 60675623 + 60675624.

It is an arithmetic number, because the mean of its divisors is an integer number (60675624).

Almost surely, 2^121351247 is an apocalyptic number.

121351247 is a deficient number, since it is larger than the sum of its proper divisors (1).

121351247 is an equidigital number, since it uses as much as digits as its factorization.

121351247 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 121351247 is about 11015.9542028823. The cubic root of 121351247 is about 495.0868765653.

The spelling of 121351247 in words is "one hundred twenty-one million, three hundred fifty-one thousand, two hundred forty-seven".