221000011101 has 48 divisors (see below), whose sum is σ = 348268624704. Its totient is φ = 134478392832.

The previous prime is 221000011097. The next prime is 221000011109. The reversal of 221000011101 is 101110000122.

It is a happy number.

221000011101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221000011101 - 2² = 221000011097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000011109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1674346 + ... + 1801508.

It is an arithmetic number, because the mean of its divisors is an integer number (7255596348).

Almost surely, 2^221000011101 is an apocalyptic number.

It is an amenable number.

221000011101 is a deficient number, since it is larger than the sum of its proper divisors (127268613603).

221000011101 is a wasteful number, since it uses less digits than its factorization.

221000011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127530 (or 127527 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 221000011101 its reverse (101110000122), we get a palindrome (322110011223).

The spelling of 221000011101 in words is "two hundred twenty-one billion, eleven thousand, one hundred one".