22404222421321 has 4 divisors (see below), whose sum is σ = 24127624146052. Its totient is φ = 20680820696592.

The previous prime is 22404222421313. The next prime is 22404222421363. The reversal of 22404222421321 is 12312422240422.

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 5716474537225 + 16687747884096 = 2390915^2 + 4085064^2 .

It is a cyclic number.

It is not a de Polignac number, because 22404222421321 - 2³ = 22404222421313 is a prime.

It is a super-2 number, since 2×22404222421321² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22404222421381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861700862346 + ... + 861700862371.

It is an arithmetic number, because the mean of its divisors is an integer number (6031906036513).

Almost surely, 2^{22404222421321} is an apocalyptic number.

It is an amenable number.

22404222421321 is a deficient number, since it is larger than the sum of its proper divisors (1723401724731).

22404222421321 is a wasteful number, since it uses less digits than its factorization.

22404222421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723401724730.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 22404222421321 its reverse (12312422240422), we get a palindrome (34716644661743).

The spelling of 22404222421321 in words is "twenty-two trillion, four hundred four billion, two hundred twenty-two million, four hundred twenty-one thousand, three hundred twenty-one".