404222200421 has 4 divisors (see below), whose sum is σ = 435316215852. Its totient is φ = 373128184992.

The previous prime is 404222200397. The next prime is 404222200423. The reversal of 404222200421 is 124002222404.

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 262405185025 + 141817015396 = 512255^2 + 376586^2 .

It is a cyclic number.

It is not a de Polignac number, because 404222200421 - 2³⁴ = 387042331237 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 (404222200423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15547007696 + ... + 15547007721.

It is an arithmetic number, because the mean of its divisors is an integer number (108829053963).

Almost surely, 2^404222200421 is an apocalyptic number.

It is an amenable number.

404222200421 is a deficient number, since it is larger than the sum of its proper divisors (31094015431).

404222200421 is a wasteful number, since it uses less digits than its factorization.

404222200421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31094015430.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 404222200421 its reverse (124002222404), we get a palindrome (528224422825).

The spelling of 404222200421 in words is "four hundred four billion, two hundred twenty-two million, two hundred thousand, four hundred twenty-one".