121247969 has 2 divisors, whose sum is σ = 121247970. Its totient is φ = 121247968.

The previous prime is 121247953. The next prime is 121248007. The reversal of 121247969 is 969742121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81721600 + 39526369 = 9040^2 + 6287^2 .

It is a cyclic number.

It is not a de Polignac number, because 121247969 - 2⁴ = 121247953 is a prime.

It is a super-2 number, since 2×121247969² = 29402139973249922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121247069) 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, 60623984 + 60623985.

It is an arithmetic number, because the mean of its divisors is an integer number (60623985).

Almost surely, 2^121247969 is an apocalyptic number.

It is an amenable number.

121247969 is a deficient number, since it is larger than the sum of its proper divisors (1).

121247969 is an equidigital number, since it uses as much as digits as its factorization.

121247969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 121247969 is about 11011.2655494271. The cubic root of 121247969 is about 494.9463860580.

The spelling of 121247969 in words is "one hundred twenty-one million, two hundred forty-seven thousand, nine hundred sixty-nine".