22221321247 has 2 divisors, whose sum is σ = 22221321248. Its totient is φ = 22221321246.

The previous prime is 22221321233. The next prime is 22221321257. The reversal of 22221321247 is 74212312222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22221321247 - 2⁷ = 22221321119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221321257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110660623 + 11110660624.

It is an arithmetic number, because the mean of its divisors is an integer number (11110660624).

Almost surely, 2^22221321247 is an apocalyptic number.

22221321247 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221321247 is an equidigital number, since it uses as much as digits as its factorization.

22221321247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

Adding to 22221321247 its reverse (74212312222), we get a palindrome (96433633469).

The spelling of 22221321247 in words is "twenty-two billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred forty-seven".