121317747 has 16 divisors (see below), whose sum is σ = 165732480. Its totient is φ = 78911552.

The previous prime is 121317743. The next prime is 121317761. The reversal of 121317747 is 747713121.

It is a cyclic number.

It is not a de Polignac number, because 121317747 - 2² = 121317743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121317743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21748 + ... + 26750.

It is an arithmetic number, because the mean of its divisors is an integer number (10358280).

Almost surely, 2^121317747 is an apocalyptic number.

121317747 is a deficient number, since it is larger than the sum of its proper divisors (44414733).

121317747 is a wasteful number, since it uses less digits than its factorization.

121317747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202.

The product of its digits is 8232, while the sum is 33.

The square root of 121317747 is about 11014.4335759947. The cubic root of 121317747 is about 495.0413147844.

The spelling of 121317747 in words is "one hundred twenty-one million, three hundred seventeen thousand, seven hundred forty-seven".