221000022111 has 16 divisors (see below), whose sum is σ = 321500557440. Its totient is φ = 133920249120.

The previous prime is 221000022097. The next prime is 221000022169. The reversal of 221000022111 is 111220000122.

It is not a de Polignac number, because 221000022111 - 2³⁴ = 203820152927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000022211) 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, 243016 + ... + 707853.

It is an arithmetic number, because the mean of its divisors is an integer number (20093784840).

Almost surely, 2^221000022111 is an apocalyptic number.

221000022111 is a deficient number, since it is larger than the sum of its proper divisors (100500535329).

221000022111 is a wasteful number, since it uses less digits than its factorization.

221000022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957926.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221000022111 its reverse (111220000122), we get a palindrome (332220022233).

The spelling of 221000022111 in words is "two hundred twenty-one billion, twenty-two thousand, one hundred eleven".