423421222421 has 4 divisors (see below), whose sum is σ = 423773780844. Its totient is φ = 423068664000.

The previous prime is 423421222417. The next prime is 423421222423. The reversal of 423421222421 is 124222124324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164990316100 + 258430906321 = 406190^2 + 508361^2 .

It is a cyclic number.

It is not a de Polignac number, because 423421222421 - 2² = 423421222417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423421222423) 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, 176277410 + ... + 176279811.

It is an arithmetic number, because the mean of its divisors is an integer number (105943445211).

Almost surely, 2^423421222421 is an apocalyptic number.

It is an amenable number.

423421222421 is a deficient number, since it is larger than the sum of its proper divisors (352558423).

423421222421 is a wasteful number, since it uses less digits than its factorization.

423421222421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352558422.

The product of its digits is 12288, while the sum is 29.

Adding to 423421222421 its reverse (124222124324), we get a palindrome (547643346745).

The spelling of 423421222421 in words is "four hundred twenty-three billion, four hundred twenty-one million, two hundred twenty-two thousand, four hundred twenty-one".