21201302201 has 4 divisors (see below), whose sum is σ = 21204107892. Its totient is φ = 21198496512.

The previous prime is 21201302197. The next prime is 21201302267. The reversal of 21201302201 is 10220310212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6855012025 + 14346290176 = 82795^2 + 119776^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201302201 - 2² = 21201302197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201307201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391480 + ... + 1406633.

It is an arithmetic number, because the mean of its divisors is an integer number (5301026973).

Almost surely, 2^21201302201 is an apocalyptic number.

It is an amenable number.

21201302201 is a deficient number, since it is larger than the sum of its proper divisors (2805691).

21201302201 is an equidigital number, since it uses as much as digits as its factorization.

21201302201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805690.

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

Adding to 21201302201 its reverse (10220310212), we get a palindrome (31421612413).

The spelling of 21201302201 in words is "twenty-one billion, two hundred one million, three hundred two thousand, two hundred one".