121391707 has 2 divisors, whose sum is σ = 121391708. Its totient is φ = 121391706.

The previous prime is 121391701. The next prime is 121391737. The reversal of 121391707 is 707193121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121391707 - 2⁷ = 121391579 is a prime.

It is not a weakly prime, because it can be changed into another prime (121391701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60695853 + 60695854.

It is an arithmetic number, because the mean of its divisors is an integer number (60695854).

Almost surely, 2^121391707 is an apocalyptic number.

121391707 is a deficient number, since it is larger than the sum of its proper divisors (1).

121391707 is an equidigital number, since it uses as much as digits as its factorization.

121391707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 121391707 is about 11017.7904772236. The cubic root of 121391707 is about 495.1418931383.

The spelling of 121391707 in words is "one hundred twenty-one million, three hundred ninety-one thousand, seven hundred seven".