121700917 has 8 divisors (see below), whose sum is σ = 133211960. Its totient is φ = 110496960.

The previous prime is 121700899. The next prime is 121700921. The reversal of 121700917 is 719007121.

It can be written as a sum of positive squares in 4 ways, for example, as 4498641 + 117202276 = 2121^2 + 10826^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121700917 is a prime.

It is a super-2 number, since 2×121700917² = 29622226397281778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121700927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75942 + ... + 77527.

It is an arithmetic number, because the mean of its divisors is an integer number (16651495).

Almost surely, 2^121700917 is an apocalyptic number.

It is an amenable number.

121700917 is a deficient number, since it is larger than the sum of its proper divisors (11511043).

121700917 is a wasteful number, since it uses less digits than its factorization.

121700917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153543.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 121700917 is about 11031.8138581106. The cubic root of 121700917 is about 495.5619465815.

The spelling of 121700917 in words is "one hundred twenty-one million, seven hundred thousand, nine hundred seventeen".