22221331331 has 4 divisors (see below), whose sum is σ = 22763315064. Its totient is φ = 21679347600.

The previous prime is 22221331313. The next prime is 22221331337. The reversal of 22221331331 is 13313312222.

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

It is a cyclic number.

It is not a de Polignac number, because 22221331331 - 2⁶ = 22221331267 is a prime.

It is a super-2 number, since 2×22221331331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221331297 and 22221331306.

It is not an unprimeable number, because it can be changed into a prime (22221331337) 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, 270991805 + ... + 270991886.

It is an arithmetic number, because the mean of its divisors is an integer number (5690828766).

Almost surely, 2^22221331331 is an apocalyptic number.

22221331331 is a deficient number, since it is larger than the sum of its proper divisors (541983733).

22221331331 is an equidigital number, since it uses as much as digits as its factorization.

22221331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541983732.

The product of its digits is 1296, while the sum is 23.

Adding to 22221331331 its reverse (13313312222), we get a palindrome (35534643553).

The spelling of 22221331331 in words is "twenty-two billion, two hundred twenty-one million, three hundred thirty-one thousand, three hundred thirty-one".