121423173 has 4 divisors (see below), whose sum is σ = 161897568. Its totient is φ = 80948780.

The previous prime is 121423153. The next prime is 121423189. The reversal of 121423173 is 371324121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121423173 - 2²¹ = 119326021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121423153) 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, 20237193 + ... + 20237198.

It is an arithmetic number, because the mean of its divisors is an integer number (40474392).

Almost surely, 2^121423173 is an apocalyptic number.

It is an amenable number.

121423173 is a deficient number, since it is larger than the sum of its proper divisors (40474395).

121423173 is an equidigital number, since it uses as much as digits as its factorization.

121423173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40474394.

The product of its digits is 1008, while the sum is 24.

The square root of 121423173 is about 11019.2183479592. The cubic root of 121423173 is about 495.1846714280.

Adding to 121423173 its reverse (371324121), we get a palindrome (492747294).

The spelling of 121423173 in words is "one hundred twenty-one million, four hundred twenty-three thousand, one hundred seventy-three".