121117709 has 6 divisors (see below), whose sum is σ = 122956974. Its totient is φ = 119305560.

The previous prime is 121117691. The next prime is 121117739. The reversal of 121117709 is 907711121.

It can be written as a sum of positive squares in only one way, i.e., 80604484 + 40513225 = 8978^2 + 6365^2 .

It is not a de Polignac number, because 121117709 - 2¹² = 121113613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121117739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9002 + ... + 17979.

It is an arithmetic number, because the mean of its divisors is an integer number (20492829).

Almost surely, 2^121117709 is an apocalyptic number.

It is an amenable number.

121117709 is a deficient number, since it is larger than the sum of its proper divisors (1839265).

121117709 is an frugal number, since it uses more digits than its factorization.

121117709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27115 (or 27048 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 29.

The square root of 121117709 is about 11005.3491085017. The cubic root of 121117709 is about 494.7690777466.

The spelling of 121117709 in words is "one hundred twenty-one million, one hundred seventeen thousand, seven hundred nine".