122442421 has 4 divisors (see below), whose sum is σ = 123704812. Its totient is φ = 121180032.

The previous prime is 122442391. The next prime is 122442443. The reversal of 122442421 is 124244221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124244221 = 233 ⋅533237.

It can be written as a sum of positive squares in 2 ways, for example, as 43428100 + 79014321 = 6590^2 + 8889^2 .

It is a cyclic number.

It is not a de Polignac number, because 122442421 - 2⁷ = 122442293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122442392 and 122442401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122442451) 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, 631050 + ... + 631243.

It is an arithmetic number, because the mean of its divisors is an integer number (30926203).

Almost surely, 2^122442421 is an apocalyptic number.

It is an amenable number.

122442421 is a deficient number, since it is larger than the sum of its proper divisors (1262391).

122442421 is an equidigital number, since it uses as much as digits as its factorization.

122442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262390.

The product of its digits is 1024, while the sum is 22.

The square root of 122442421 is about 11065.3703507836. The cubic root of 122442421 is about 496.5663689988.

Adding to 122442421 its reverse (124244221), we get a palindrome (246686642).

The spelling of 122442421 in words is "one hundred twenty-two million, four hundred forty-two thousand, four hundred twenty-one".