22442002421 has 4 divisors (see below), whose sum is σ = 22486619232. Its totient is φ = 22397385612.

The previous prime is 22442002409. The next prime is 22442002463. The reversal of 22442002421 is 12420024422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22442002421 - 2⁶ = 22442002357 is a prime.

It is a super-2 number, since 2×22442002421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22442002021) 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, 22307651 + ... + 22308656.

It is an arithmetic number, because the mean of its divisors is an integer number (5621654808).

Almost surely, 2^22442002421 is an apocalyptic number.

It is an amenable number.

22442002421 is a deficient number, since it is larger than the sum of its proper divisors (44616811).

22442002421 is an equidigital number, since it uses as much as digits as its factorization.

22442002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44616810.

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

Adding to 22442002421 its reverse (12420024422), we get a palindrome (34862026843).

The spelling of 22442002421 in words is "twenty-two billion, four hundred forty-two million, two thousand, four hundred twenty-one".