221000010111011 has 4 divisors (see below), whose sum is σ = 221000343509832. Its totient is φ = 220999676712192.

The previous prime is 221000010110993. The next prime is 221000010111017. The reversal of 221000010111011 is 110111010000122.

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-221000010111011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000010110983 and 221000010111001.

It is not an unprimeable number, because it can be changed into a prime (221000010111017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165703121 + ... + 167031506.

It is an arithmetic number, because the mean of its divisors is an integer number (55250085877458).

Almost surely, 2^{221000010111011} is an apocalyptic number.

221000010111011 is a deficient number, since it is larger than the sum of its proper divisors (333398821).

221000010111011 is an equidigital number, since it uses as much as digits as its factorization.

221000010111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333398820.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 221000010111011 its reverse (110111010000122), we get a palindrome (331111020111133).

The spelling of 221000010111011 in words is "two hundred twenty-one trillion, ten million, one hundred eleven thousand, eleven".