21222004163331 has 4 divisors (see below), whose sum is σ = 28296005551112. Its totient is φ = 14148002775552.

The previous prime is 21222004163323. The next prime is 21222004163357. The reversal of 21222004163331 is 13336140022212.

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

It is not a de Polignac number, because 21222004163331 - 2³ = 21222004163323 is a prime.

It is a super-2 number, since 2×21222004163331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222004143331) 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, 3537000693886 + ... + 3537000693891.

It is an arithmetic number, because the mean of its divisors is an integer number (7074001387778).

Almost surely, 2^{21222004163331} is an apocalyptic number.

21222004163331 is a deficient number, since it is larger than the sum of its proper divisors (7074001387781).

21222004163331 is an equidigital number, since it uses as much as digits as its factorization.

21222004163331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074001387780.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 21222004163331 its reverse (13336140022212), we get a palindrome (34558144185543).

The spelling of 21222004163331 in words is "twenty-one trillion, two hundred twenty-two billion, four million, one hundred sixty-three thousand, three hundred thirty-one".