201212221000001 has 4 divisors (see below), whose sum is σ = 201218485617600. Its totient is φ = 201205956382404.

The previous prime is 201212220999989. The next prime is 201212221000019. The reversal of 201212221000001 is 100000122212102.

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 201212221000001 - 2²⁶ = 201212153891137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201212221000001.

It is not an unprimeable number, because it can be changed into a prime (201212221000031) 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, 3132260621 + ... + 3132324858.

It is an arithmetic number, because the mean of its divisors is an integer number (50304621404400).

Almost surely, 2^{201212221000001} is an apocalyptic number.

It is an amenable number.

201212221000001 is a deficient number, since it is larger than the sum of its proper divisors (6264617599).

201212221000001 is an equidigital number, since it uses as much as digits as its factorization.

201212221000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6264617598.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201212221000001 its reverse (100000122212102), we get a palindrome (301212343212103).

The spelling of 201212221000001 in words is "two hundred one trillion, two hundred twelve billion, two hundred twenty-one million, one", and thus it is an aban number.