121072717 has 2 divisors, whose sum is σ = 121072718. Its totient is φ = 121072716.

The previous prime is 121072619. The next prime is 121072733. The reversal of 121072717 is 717270121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76370121 + 44702596 = 8739^2 + 6686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121072717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121073717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60536358 + 60536359.

It is an arithmetic number, because the mean of its divisors is an integer number (60536359).

Almost surely, 2^121072717 is an apocalyptic number.

It is an amenable number.

121072717 is a deficient number, since it is larger than the sum of its proper divisors (1).

121072717 is an equidigital number, since it uses as much as digits as its factorization.

121072717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1372, while the sum is 28.

The square root of 121072717 is about 11003.3048217342. The cubic root of 121072717 is about 494.7078056515.

The spelling of 121072717 in words is "one hundred twenty-one million, seventy-two thousand, seven hundred seventeen".