121423423 has 4 divisors (see below), whose sum is σ = 132461928. Its totient is φ = 110384920.

The previous prime is 121423411. The next prime is 121423429. The reversal of 121423423 is 324324121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121423423 - 2¹⁷ = 121292351 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121423394 and 121423403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121423429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5519236 + ... + 5519257.

It is an arithmetic number, because the mean of its divisors is an integer number (33115482).

Almost surely, 2^121423423 is an apocalyptic number.

121423423 is a deficient number, since it is larger than the sum of its proper divisors (11038505).

121423423 is a wasteful number, since it uses less digits than its factorization.

121423423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038504.

The product of its digits is 1152, while the sum is 22.

The square root of 121423423 is about 11019.2296917707. The cubic root of 121423423 is about 495.1850112755.

Adding to 121423423 its reverse (324324121), we get a palindrome (445747544).

The spelling of 121423423 in words is "one hundred twenty-one million, four hundred twenty-three thousand, four hundred twenty-three".