121757707 has 2 divisors, whose sum is σ = 121757708. Its totient is φ = 121757706.

The previous prime is 121757663. The next prime is 121757729. The reversal of 121757707 is 707757121.

It is a strong prime.

It is an emirp because it is prime and its reverse (707757121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121757707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121757107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60878853 + 60878854.

It is an arithmetic number, because the mean of its divisors is an integer number (60878854).

Almost surely, 2^121757707 is an apocalyptic number.

121757707 is a deficient number, since it is larger than the sum of its proper divisors (1).

121757707 is an equidigital number, since it uses as much as digits as its factorization.

121757707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24010, while the sum is 37.

The square root of 121757707 is about 11034.3874773365. The cubic root of 121757707 is about 495.6390169034.

The spelling of 121757707 in words is "one hundred twenty-one million, seven hundred fifty-seven thousand, seven hundred seven".