21102222353 has 2 divisors, whose sum is σ = 21102222354. Its totient is φ = 21102222352.

The previous prime is 21102222313. The next prime is 21102222359. The reversal of 21102222353 is 35322220112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20902508929 + 199713424 = 144577^2 + 14132^2 .

It is a cyclic number.

It is not a de Polignac number, because 21102222353 - 2⁶ = 21102222289 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102222359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551111176 + 10551111177.

It is an arithmetic number, because the mean of its divisors is an integer number (10551111177).

Almost surely, 2^21102222353 is an apocalyptic number.

It is an amenable number.

21102222353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102222353 is an equidigital number, since it uses as much as digits as its factorization.

21102222353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21102222353 its reverse (35322220112), we get a palindrome (56424442465).

The spelling of 21102222353 in words is "twenty-one billion, one hundred two million, two hundred twenty-two thousand, three hundred fifty-three".