21232223297 has 2 divisors, whose sum is σ = 21232223298. Its totient is φ = 21232223296.

The previous prime is 21232223291. The next prime is 21232223317. The reversal of 21232223297 is 79232223212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21153084481 + 79138816 = 145441^2 + 8896^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232223297 - 2²² = 21228028993 is a prime.

It is a super-2 number, since 2×21232223297² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21232223291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616111648 + 10616111649.

It is an arithmetic number, because the mean of its divisors is an integer number (10616111649).

Almost surely, 2^21232223297 is an apocalyptic number.

It is an amenable number.

21232223297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232223297 is an equidigital number, since it uses as much as digits as its factorization.

21232223297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The spelling of 21232223297 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty-three thousand, two hundred ninety-seven".