21002221301 has 2 divisors, whose sum is σ = 21002221302. Its totient is φ = 21002221300.

The previous prime is 21002221223. The next prime is 21002221307. The reversal of 21002221301 is 10312220012.

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., 20577902500 + 424318801 = 143450^2 + 20599^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002221301 - 2³⁰ = 19928479477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002221307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501110650 + 10501110651.

It is an arithmetic number, because the mean of its divisors is an integer number (10501110651).

Almost surely, 2^21002221301 is an apocalyptic number.

It is an amenable number.

21002221301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002221301 is an equidigital number, since it uses as much as digits as its factorization.

21002221301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21002221301 its reverse (10312220012), we get a palindrome (31314441313).

The spelling of 21002221301 in words is "twenty-one billion, two million, two hundred twenty-one thousand, three hundred one".