221002100111 has 8 divisors (see below), whose sum is σ = 238457340240. Its totient is φ = 203611871232.

The previous prime is 221002100107. The next prime is 221002100119. The reversal of 221002100111 is 111001200122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221002100111 - 2² = 221002100107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221002100092 and 221002100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002100119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16245746 + ... + 16259343.

It is an arithmetic number, because the mean of its divisors is an integer number (29807167530).

Almost surely, 2^221002100111 is an apocalyptic number.

221002100111 is a deficient number, since it is larger than the sum of its proper divisors (17455240129).

221002100111 is a wasteful number, since it uses less digits than its factorization.

221002100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32505625.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221002100111 its reverse (111001200122), we get a palindrome (332003300233).

The spelling of 221002100111 in words is "two hundred twenty-one billion, two million, one hundred thousand, one hundred eleven".