221012221100111 has 6 divisors (see below), whose sum is σ = 257095849034880. Its totient is φ = 189439046657196.

The previous prime is 221012221100039. The next prime is 221012221100191. The reversal of 221012221100111 is 111001122210122.

It is not a de Polignac number, because 221012221100111 - 2⁴⁶ = 150643476922447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221012221100111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012221100191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2255226745871 + ... + 2255226745968.

It is an arithmetic number, because the mean of its divisors is an integer number (42849308172480).

Almost surely, 2^{221012221100111} is an apocalyptic number.

221012221100111 is a deficient number, since it is larger than the sum of its proper divisors (36083627934769).

221012221100111 is an equidigital number, since it uses as much as digits as its factorization.

221012221100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510453491853 (or 4510453491846 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221012221100111 its reverse (111001122210122), we get a palindrome (332013343310233).

The spelling of 221012221100111 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, one hundred thousand, one hundred eleven".