121315997 has 8 divisors (see below), whose sum is σ = 133086240. Its totient is φ = 109669360.

The previous prime is 121315991. The next prime is 121316011. The reversal of 121315997 is 799513121.

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

It is a cyclic number.

It is not a de Polignac number, because 121315997 - 2²⁴ = 104538781 is a prime.

It is a super-2 number, since 2×121315997² = 29435142256208018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121315997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121315991) 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, 28838 + ... + 32775.

It is an arithmetic number, because the mean of its divisors is an integer number (16635780).

Almost surely, 2^121315997 is an apocalyptic number.

It is an amenable number.

121315997 is a deficient number, since it is larger than the sum of its proper divisors (11770243).

121315997 is a wasteful number, since it uses less digits than its factorization.

121315997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61803.

The product of its digits is 17010, while the sum is 38.

The square root of 121315997 is about 11014.3541344920. The cubic root of 121315997 is about 495.0389344609.

The spelling of 121315997 in words is "one hundred twenty-one million, three hundred fifteen thousand, nine hundred ninety-seven".