121243403 has 8 divisors (see below), whose sum is σ = 125752080. Its totient is φ = 116756640.

The previous prime is 121243399. The next prime is 121243457. The reversal of 121243403 is 304342121.

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 121243403 - 2² = 121243399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121243103) 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 7 ways as a sum of consecutive naturals, for example, 6248 + ... + 16778.

It is an arithmetic number, because the mean of its divisors is an integer number (15719010).

Almost surely, 2^121243403 is an apocalyptic number.

121243403 is a deficient number, since it is larger than the sum of its proper divisors (4508677).

121243403 is a wasteful number, since it uses less digits than its factorization.

121243403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10957.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 121243403 is about 11011.0582143589. The cubic root of 121243403 is about 494.9401730232.

Adding to 121243403 its reverse (304342121), we get a palindrome (425585524).

The spelling of 121243403 in words is "one hundred twenty-one million, two hundred forty-three thousand, four hundred three".