221000120111 has 16 divisors (see below), whose sum is σ = 242533146240. Its totient is φ = 200640978720.

The previous prime is 221000120093. The next prime is 221000120119. The reversal of 221000120111 is 111021000122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221000120111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000120092 and 221000120101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000120119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2508605 + ... + 2595206.

It is an arithmetic number, because the mean of its divisors is an integer number (15158321640).

Almost surely, 2^221000120111 is an apocalyptic number.

221000120111 is a deficient number, since it is larger than the sum of its proper divisors (21533026129).

221000120111 is a wasteful number, since it uses less digits than its factorization.

221000120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103926.

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

Adding to 221000120111 its reverse (111021000122), we get a palindrome (332021120233).

The spelling of 221000120111 in words is "two hundred twenty-one billion, one hundred twenty thousand, one hundred eleven".