221100020201111 has 4 divisors (see below), whose sum is σ = 221100081889224. Its totient is φ = 221099958513000.

The previous prime is 221100020201077. The next prime is 221100020201153. The reversal of 221100020201111 is 111102020001122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221100020201111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100020201171) 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, 25112840 + ... + 32754461.

It is an arithmetic number, because the mean of its divisors is an integer number (55275020472306).

Almost surely, 2^{221100020201111} is an apocalyptic number.

221100020201111 is a deficient number, since it is larger than the sum of its proper divisors (61688113).

221100020201111 is an equidigital number, since it uses as much as digits as its factorization.

221100020201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61688112.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221100020201111 its reverse (111102020001122), we get a palindrome (332202040202233).

The spelling of 221100020201111 in words is "two hundred twenty-one trillion, one hundred billion, twenty million, two hundred one thousand, one hundred eleven".