21210101200201 has 4 divisors (see below), whose sum is σ = 21269182262400. Its totient is φ = 21151020138004.

The previous prime is 21210101200139. The next prime is 21210101200207. The reversal of 21210101200201 is 10200210101212.

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 21210101200201 - 2⁹ = 21210101199689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210101200207) 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, 29540530561 + ... + 29540531278.

It is an arithmetic number, because the mean of its divisors is an integer number (5317295565600).

Almost surely, 2^{21210101200201} is an apocalyptic number.

It is an amenable number.

21210101200201 is a deficient number, since it is larger than the sum of its proper divisors (59081062199).

21210101200201 is an equidigital number, since it uses as much as digits as its factorization.

21210101200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59081062198.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210101200201 its reverse (10200210101212), we get a palindrome (31410311301413).

The spelling of 21210101200201 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, two hundred thousand, two hundred one".