121247953 has 2 divisors, whose sum is σ = 121247954. Its totient is φ = 121247952.

The previous prime is 121247887. The next prime is 121247969. The reversal of 121247953 is 359742121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120494529 + 753424 = 10977^2 + 868^2 .

It is an emirp because it is prime and its reverse (359742121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121247953 - 2¹³ = 121239761 is a prime.

It is a super-2 number, since 2×121247953² = 29402132213380418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121247653) 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, 60623976 + 60623977.

It is an arithmetic number, because the mean of its divisors is an integer number (60623977).

Almost surely, 2^121247953 is an apocalyptic number.

It is an amenable number.

121247953 is a deficient number, since it is larger than the sum of its proper divisors (1).

121247953 is an equidigital number, since it uses as much as digits as its factorization.

121247953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 121247953 is about 11011.2648228984. The cubic root of 121247953 is about 494.9463642868.

The spelling of 121247953 in words is "one hundred twenty-one million, two hundred forty-seven thousand, nine hundred fifty-three".