21022002601 has 2 divisors, whose sum is σ = 21022002602. Its totient is φ = 21022002600.

The previous prime is 21022002569. The next prime is 21022002619. The reversal of 21022002601 is 10620022012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17735846976 + 3286155625 = 133176^2 + 57325^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022002601 - 2⁵ = 21022002569 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022002901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511001300 + 10511001301.

It is an arithmetic number, because the mean of its divisors is an integer number (10511001301).

Almost surely, 2^21022002601 is an apocalyptic number.

It is an amenable number.

21022002601 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022002601 is an equidigital number, since it uses as much as digits as its factorization.

21022002601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21022002601 its reverse (10620022012), we get a palindrome (31642024613).

The spelling of 21022002601 in words is "twenty-one billion, twenty-two million, two thousand, six hundred one".