21211302201 has 4 divisors (see below), whose sum is σ = 28281736272. Its totient is φ = 14140868132.

The previous prime is 21211302187. The next prime is 21211302209. The reversal of 21211302201 is 10220311212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21211302201 - 2⁹ = 21211301689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21211302209) 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, 3535217031 + ... + 3535217036.

It is an arithmetic number, because the mean of its divisors is an integer number (7070434068).

Almost surely, 2^21211302201 is an apocalyptic number.

It is an amenable number.

21211302201 is a deficient number, since it is larger than the sum of its proper divisors (7070434071).

21211302201 is an equidigital number, since it uses as much as digits as its factorization.

21211302201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070434070.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21211302201 its reverse (10220311212), we get a palindrome (31431613413).

The spelling of 21211302201 in words is "twenty-one billion, two hundred eleven million, three hundred two thousand, two hundred one".