21211200201 has 4 divisors (see below), whose sum is σ = 28281600272. Its totient is φ = 14140800132.

The previous prime is 21211200193. The next prime is 21211200211. The reversal of 21211200201 is 10200211212.

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 not a de Polignac number, because 21211200201 - 2³ = 21211200193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211200211) 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, 3535200031 + ... + 3535200036.

It is an arithmetic number, because the mean of its divisors is an integer number (7070400068).

Almost surely, 2^21211200201 is an apocalyptic number.

It is an amenable number.

21211200201 is a deficient number, since it is larger than the sum of its proper divisors (7070400071).

21211200201 is an equidigital number, since it uses as much as digits as its factorization.

21211200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070400070.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21211200201 its reverse (10200211212), we get a palindrome (31411411413).

The spelling of 21211200201 in words is "twenty-one billion, two hundred eleven million, two hundred thousand, two hundred one".