121218383 has 8 divisors (see below), whose sum is σ = 142410576. Its totient is φ = 101721600.

The previous prime is 121218379. The next prime is 121218389. The reversal of 121218383 is 383812121.

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 121218383 - 2² = 121218379 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121218389) 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, 423698 + ... + 423983.

It is an arithmetic number, because the mean of its divisors is an integer number (17801322).

Almost surely, 2^121218383 is an apocalyptic number.

121218383 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121218383 is a deficient number, since it is larger than the sum of its proper divisors (21192193).

121218383 is a wasteful number, since it uses less digits than its factorization.

121218383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847705.

The product of its digits is 2304, while the sum is 29.

The square root of 121218383 is about 11009.9220251553. The cubic root of 121218383 is about 494.9061251087.

The spelling of 121218383 in words is "one hundred twenty-one million, two hundred eighteen thousand, three hundred eighty-three".