121242423 has 8 divisors (see below), whose sum is σ = 161728000. Its totient is φ = 80792568.

The previous prime is 121242409. The next prime is 121242427. The reversal of 121242423 is 324242121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121242423 - 2⁵ = 121242391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121242423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121242427) 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, 378 + ... + 15576.

It is an arithmetic number, because the mean of its divisors is an integer number (20216000).

Almost surely, 2^121242423 is an apocalyptic number.

121242423 is a deficient number, since it is larger than the sum of its proper divisors (40485577).

121242423 is a wasteful number, since it uses less digits than its factorization.

121242423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17861.

The product of its digits is 768, while the sum is 21.

The square root of 121242423 is about 11011.0137135506. The cubic root of 121242423 is about 494.9388395000.

Adding to 121242423 its reverse (324242121), we get a palindrome (445484544).

The spelling of 121242423 in words is "one hundred twenty-one million, two hundred forty-two thousand, four hundred twenty-three".