121566997 has 8 divisors (see below), whose sum is σ = 128072160. Its totient is φ = 115072560.

The previous prime is 121566967. The next prime is 121567007. The reversal of 121566997 is 799665121.

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-121566997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121566917) 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, 32643 + ... + 36175.

It is an arithmetic number, because the mean of its divisors is an integer number (16009020).

Almost surely, 2^121566997 is an apocalyptic number.

It is an amenable number.

121566997 is a deficient number, since it is larger than the sum of its proper divisors (6505163).

121566997 is a wasteful number, since it uses less digits than its factorization.

121566997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363.

The product of its digits is 204120, while the sum is 46.

The square root of 121566997 is about 11025.7424693306. The cubic root of 121566997 is about 495.3801073223.

The spelling of 121566997 in words is "one hundred twenty-one million, five hundred sixty-six thousand, nine hundred ninety-seven".