21222233353 has 2 divisors, whose sum is σ = 21222233354. Its totient is φ = 21222233352.

The previous prime is 21222233323. The next prime is 21222233359. The reversal of 21222233353 is 35333222212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16030598544 + 5191634809 = 126612^2 + 72053^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222233353 - 2²⁹ = 20685362441 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222233359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611116676 + 10611116677.

It is an arithmetic number, because the mean of its divisors is an integer number (10611116677).

Almost surely, 2^21222233353 is an apocalyptic number.

It is an amenable number.

21222233353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222233353 is an equidigital number, since it uses as much as digits as its factorization.

21222233353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 28.

Adding to 21222233353 its reverse (35333222212), we get a palindrome (56555455565).

The spelling of 21222233353 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, three hundred fifty-three".