221111111002011 has 4 divisors (see below), whose sum is σ = 294814814669352. Its totient is φ = 147407407334672.

The previous prime is 221111111001983. The next prime is 221111111002021. The reversal of 221111111002011 is 110200111111122.

221111111002011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221111111002011 - 2¹¹ = 221111110999963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221111111002021) 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, 36851851833666 + ... + 36851851833671.

It is an arithmetic number, because the mean of its divisors is an integer number (73703703667338).

Almost surely, 2^{221111111002011} is an apocalyptic number.

221111111002011 is a deficient number, since it is larger than the sum of its proper divisors (73703703667341).

221111111002011 is an equidigital number, since it uses as much as digits as its factorization.

221111111002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73703703667340.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 221111111002011 its reverse (110200111111122), we get a palindrome (331311222113133).

The spelling of 221111111002011 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, two thousand, eleven".