121643422 has 4 divisors (see below), whose sum is σ = 182465136. Its totient is φ = 60821710.

The previous prime is 121643419. The next prime is 121643471. The reversal of 121643422 is 224346121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224346121 = 439 ⋅511039.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30410854 + ... + 30410857.

It is an arithmetic number, because the mean of its divisors is an integer number (45616284).

Almost surely, 2^121643422 is an apocalyptic number.

121643422 is a deficient number, since it is larger than the sum of its proper divisors (60821714).

121643422 is an equidigital number, since it uses as much as digits as its factorization.

121643422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60821713.

The product of its digits is 2304, while the sum is 25.

The square root of 121643422 is about 11029.2076777981. The cubic root of 121643422 is about 495.4838950683.

Adding to 121643422 its reverse (224346121), we get a palindrome (345989543).

The spelling of 121643422 in words is "one hundred twenty-one million, six hundred forty-three thousand, four hundred twenty-two".