21202201201 has 2 divisors, whose sum is σ = 21202201202. Its totient is φ = 21202201200.

The previous prime is 21202201177. The next prime is 21202201247. The reversal of 21202201201 is 10210220212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14213408400 + 6988792801 = 119220^2 + 83599^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202201201 - 2⁵ = 21202201169 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202271201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601100600 + 10601100601.

It is an arithmetic number, because the mean of its divisors is an integer number (10601100601).

Almost surely, 2^21202201201 is an apocalyptic number.

It is an amenable number.

21202201201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202201201 is an equidigital number, since it uses as much as digits as its factorization.

21202201201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21202201201 its reverse (10210220212), we get a palindrome (31412421413).

The spelling of 21202201201 in words is "twenty-one billion, two hundred two million, two hundred one thousand, two hundred one".