22231221013 has 2 divisors, whose sum is σ = 22231221014. Its totient is φ = 22231221012.

The previous prime is 22231220993. The next prime is 22231221037. The reversal of 22231221013 is 31012213222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12405058884 + 9826162129 = 111378^2 + 99127^2 .

It is a cyclic number.

It is not a de Polignac number, because 22231221013 - 2⁵ = 22231220981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22231225013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115610506 + 11115610507.

It is an arithmetic number, because the mean of its divisors is an integer number (11115610507).

Almost surely, 2^22231221013 is an apocalyptic number.

It is an amenable number.

22231221013 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231221013 is an equidigital number, since it uses as much as digits as its factorization.

22231221013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22231221013 its reverse (31012213222), we get a palindrome (53243434235).

It can be divided in two parts, 2223 and 1221013, that added together give a square (1223236 = 1106²).

The spelling of 22231221013 in words is "twenty-two billion, two hundred thirty-one million, two hundred twenty-one thousand, thirteen".