21322440201 has 4 divisors (see below), whose sum is σ = 28429920272. Its totient is φ = 14214960132.

The previous prime is 21322440173. The next prime is 21322440203. The reversal of 21322440201 is 10204422312.

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 not a de Polignac number, because 21322440201 - 2⁶ = 21322440137 is a prime.

It is a super-2 number, since 2×21322440201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21322440203) 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, 3553740031 + ... + 3553740036.

It is an arithmetic number, because the mean of its divisors is an integer number (7107480068).

Almost surely, 2^21322440201 is an apocalyptic number.

It is an amenable number.

21322440201 is a deficient number, since it is larger than the sum of its proper divisors (7107480071).

21322440201 is an equidigital number, since it uses as much as digits as its factorization.

21322440201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107480070.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21322440201 its reverse (10204422312), we get a palindrome (31526862513).

The spelling of 21322440201 in words is "twenty-one billion, three hundred twenty-two million, four hundred forty thousand, two hundred one".