200111001221 has 4 divisors (see below), whose sum is σ = 210643159200. Its totient is φ = 189578843244.

The previous prime is 200111001191. The next prime is 200111001227. The reversal of 200111001221 is 122100111002.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122100111002 = 2 ⋅61050055501.

It is a cyclic number.

It is not a de Polignac number, because 200111001221 - 2¹⁴ = 200110984837 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 (200111001227) 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, 5266078961 + ... + 5266078998.

It is an arithmetic number, because the mean of its divisors is an integer number (52660789800).

Almost surely, 2^200111001221 is an apocalyptic number.

It is an amenable number.

200111001221 is a deficient number, since it is larger than the sum of its proper divisors (10532157979).

200111001221 is a wasteful number, since it uses less digits than its factorization.

200111001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10532157978.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200111001221 its reverse (122100111002), we get a palindrome (322211112223).

The spelling of 200111001221 in words is "two hundred billion, one hundred eleven million, one thousand, two hundred twenty-one".