221011110001 has 4 divisors (see below), whose sum is σ = 241103029104. Its totient is φ = 200919190900.

The previous prime is 221011109989. The next prime is 221011110029. The reversal of 221011110001 is 100011110122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221011110001 - 2¹³ = 221011101809 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 221011110001.

It is not an unprimeable number, because it can be changed into a prime (221011110041) 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, 10045959535 + ... + 10045959556.

It is an arithmetic number, because the mean of its divisors is an integer number (60275757276).

Almost surely, 2^221011110001 is an apocalyptic number.

It is an amenable number.

221011110001 is a deficient number, since it is larger than the sum of its proper divisors (20091919103).

221011110001 is a wasteful number, since it uses less digits than its factorization.

221011110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20091919102.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 221011110001 its reverse (100011110122), we get a palindrome (321022220123).

The spelling of 221011110001 in words is "two hundred twenty-one billion, eleven million, one hundred ten thousand, one".