121399363 has 12 divisors (see below), whose sum is σ = 131973160. Its totient is φ = 111589632.

The previous prime is 121399357. The next prime is 121399367. The reversal of 121399363 is 363993121.

It is a de Polignac number, because none of the positive numbers 2^k-121399363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121399367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7543 + ... + 17311.

Almost surely, 2^121399363 is an apocalyptic number.

121399363 is a deficient number, since it is larger than the sum of its proper divisors (10573797).

121399363 is an equidigital number, since it uses as much as digits as its factorization.

121399363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9846 (or 9829 counting only the distinct ones).

The product of its digits is 26244, while the sum is 37.

The square root of 121399363 is about 11018.1379098285. The cubic root of 121399363 is about 495.1523022147.

It can be divided in two parts, 1213 and 99363, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 121399363 in words is "one hundred twenty-one million, three hundred ninety-nine thousand, three hundred sixty-three".