121015717 has 4 divisors (see below), whose sum is σ = 123830080. Its totient is φ = 118201356.

The previous prime is 121015709. The next prime is 121015729. The reversal of 121015717 is 717510121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121015717 - 2³ = 121015709 is a prime.

It is a super-2 number, since 2×121015717² = 29289607522048178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121015691 and 121015700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121015777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407117 + ... + 1407202.

It is an arithmetic number, because the mean of its divisors is an integer number (30957520).

Almost surely, 2^121015717 is an apocalyptic number.

It is an amenable number.

121015717 is a deficient number, since it is larger than the sum of its proper divisors (2814363).

121015717 is an equidigital number, since it uses as much as digits as its factorization.

121015717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814362.

The product of its (nonzero) digits is 490, while the sum is 25.

The square root of 121015717 is about 11000.7143858933. The cubic root of 121015717 is about 494.6301587300.

Adding to 121015717 its reverse (717510121), we get a palindrome (838525838).

The spelling of 121015717 in words is "one hundred twenty-one million, fifteen thousand, seven hundred seventeen".