22211334521 has 2 divisors, whose sum is σ = 22211334522. Its totient is φ = 22211334520.

The previous prime is 22211334443. The next prime is 22211334529. The reversal of 22211334521 is 12543311222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21850752400 + 360582121 = 147820^2 + 18989^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211334521 - 2²² = 22207140217 is a prime.

It is not a weakly prime, because it can be changed into another prime (22211334529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105667260 + 11105667261.

It is an arithmetic number, because the mean of its divisors is an integer number (11105667261).

Almost surely, 2^22211334521 is an apocalyptic number.

It is an amenable number.

22211334521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211334521 is an equidigital number, since it uses as much as digits as its factorization.

22211334521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

Adding to 22211334521 its reverse (12543311222), we get a palindrome (34754645743).

The spelling of 22211334521 in words is "twenty-two billion, two hundred eleven million, three hundred thirty-four thousand, five hundred twenty-one".