21224410601 has 2 divisors, whose sum is σ = 21224410602. Its totient is φ = 21224410600.

The previous prime is 21224410499. The next prime is 21224410619. The reversal of 21224410601 is 10601442212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20931144976 + 293265625 = 144676^2 + 17125^2 .

It is a cyclic number.

It is not a de Polignac number, because 21224410601 - 2³⁰ = 20150668777 is a prime.

It is not a weakly prime, because it can be changed into another prime (21224410001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612205300 + 10612205301.

It is an arithmetic number, because the mean of its divisors is an integer number (10612205301).

Almost surely, 2^21224410601 is an apocalyptic number.

It is an amenable number.

21224410601 is a deficient number, since it is larger than the sum of its proper divisors (1).

21224410601 is an equidigital number, since it uses as much as digits as its factorization.

21224410601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21224410601 its reverse (10601442212), we get a palindrome (31825852813).

The spelling of 21224410601 in words is "twenty-one billion, two hundred twenty-four million, four hundred ten thousand, six hundred one".