121917253 has 2 divisors, whose sum is σ = 121917254. Its totient is φ = 121917252.

The previous prime is 121917239. The next prime is 121917269. The reversal of 121917253 is 352719121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118004769 + 3912484 = 10863^2 + 1978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121917253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121917283) 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, 60958626 + 60958627.

It is an arithmetic number, because the mean of its divisors is an integer number (60958627).

Almost surely, 2^121917253 is an apocalyptic number.

It is an amenable number.

121917253 is a deficient number, since it is larger than the sum of its proper divisors (1).

121917253 is an equidigital number, since it uses as much as digits as its factorization.

121917253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 121917253 is about 11041.6146011351. The cubic root of 121917253 is about 495.8554103455.

The spelling of 121917253 in words is "one hundred twenty-one million, nine hundred seventeen thousand, two hundred fifty-three".