121442423 has 4 divisors (see below), whose sum is σ = 122059080. Its totient is φ = 120825768.

The previous prime is 121442389. The next prime is 121442437. The reversal of 121442423 is 324244121.

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 121442423 - 2⁶ = 121442359 is a prime.

It is a super-2 number, since 2×121442423² = 29496524208221858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308033 + ... + 308426.

It is an arithmetic number, because the mean of its divisors is an integer number (30514770).

Almost surely, 2^121442423 is an apocalyptic number.

121442423 is a deficient number, since it is larger than the sum of its proper divisors (616657).

121442423 is an equidigital number, since it uses as much as digits as its factorization.

121442423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616656.

The product of its digits is 1536, while the sum is 23.

The square root of 121442423 is about 11020.0917872765. The cubic root of 121442423 is about 495.2108383202.

Adding to 121442423 its reverse (324244121), we get a palindrome (445686544).

The spelling of 121442423 in words is "one hundred twenty-one million, four hundred forty-two thousand, four hundred twenty-three".