221000111201 has 4 divisors (see below), whose sum is σ = 230608811712. Its totient is φ = 211391410692.

The previous prime is 221000111083. The next prime is 221000111221. The reversal of 221000111201 is 102111000122.

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: 102111000122 = 2 ⋅51055500061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221000111201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221000111221) 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, 4804350221 + ... + 4804350266.

It is an arithmetic number, because the mean of its divisors is an integer number (57652202928).

Almost surely, 2^221000111201 is an apocalyptic number.

It is an amenable number.

221000111201 is a deficient number, since it is larger than the sum of its proper divisors (9608700511).

221000111201 is an equidigital number, since it uses as much as digits as its factorization.

221000111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9608700510.

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

Adding to 221000111201 its reverse (102111000122), we get a palindrome (323111111323).

The spelling of 221000111201 in words is "two hundred twenty-one billion, one hundred eleven thousand, two hundred one".