200010001221 has 8 divisors (see below), whose sum is σ = 296311112960. Its totient is φ = 133340000796.

The previous prime is 200010001201. The next prime is 200010001231. The reversal of 200010001221 is 122100010002.

It is not a de Polignac number, because 200010001221 - 2⁶ = 200010001157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200010001201) 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, 3703888885 + ... + 3703888938.

It is an arithmetic number, because the mean of its divisors is an integer number (37038889120).

Almost surely, 2^200010001221 is an apocalyptic number.

It is an amenable number.

200010001221 is a deficient number, since it is larger than the sum of its proper divisors (96301111739).

200010001221 is an equidigital number, since it uses as much as digits as its factorization.

200010001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407777832 (or 7407777826 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 200010001221 its reverse (122100010002), we get a palindrome (322110011223).

The spelling of 200010001221 in words is "two hundred billion, ten million, one thousand, two hundred twenty-one".