121423413 has 4 divisors (see below), whose sum is σ = 161897888. Its totient is φ = 80948940.

The previous prime is 121423411. The next prime is 121423429. The reversal of 121423413 is 314324121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 314324121 = 3 ⋅104774707.

It is not a de Polignac number, because 121423413 - 2¹ = 121423411 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121423413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121423411) 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, 20237233 + ... + 20237238.

It is an arithmetic number, because the mean of its divisors is an integer number (40474472).

Almost surely, 2^121423413 is an apocalyptic number.

It is an amenable number.

121423413 is a deficient number, since it is larger than the sum of its proper divisors (40474475).

121423413 is an equidigital number, since it uses as much as digits as its factorization.

121423413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40474474.

The product of its digits is 576, while the sum is 21.

The square root of 121423413 is about 11019.2292380184. The cubic root of 121423413 is about 495.1849976816.

Adding to 121423413 its reverse (314324121), we get a palindrome (435747534).

The spelling of 121423413 in words is "one hundred twenty-one million, four hundred twenty-three thousand, four hundred thirteen".