201000012221 has 8 divisors (see below), whose sum is σ = 201640627800. Its totient is φ = 200360361280.

The previous prime is 201000012179. The next prime is 201000012229. The reversal of 201000012221 is 122210000102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56591652100 + 144408360121 = 237890^2 + 380011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201000012221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000012229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177395 + ... + 658383.

It is an arithmetic number, because the mean of its divisors is an integer number (25205078475).

Almost surely, 2^201000012221 is an apocalyptic number.

It is an amenable number.

201000012221 is a deficient number, since it is larger than the sum of its proper divisors (640615579).

201000012221 is an equidigital number, since it uses as much as digits as its factorization.

201000012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482319.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 201000012221 its reverse (122210000102), we get a palindrome (323210012323).

The spelling of 201000012221 in words is "two hundred one billion, twelve thousand, two hundred twenty-one".