221200011101 has 24 divisors (see below), whose sum is σ = 235677805440. Its totient is φ = 207544651776.

The previous prime is 221200011089. The next prime is 221200011127. The reversal of 221200011101 is 101110002122.

It is a de Polignac number, because none of the positive numbers 2^k-221200011101 is a prime.

It is a super-2 number, since 2×221200011101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200011401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8457821 + ... + 8483933.

It is an arithmetic number, because the mean of its divisors is an integer number (9819908560).

Almost surely, 2^221200011101 is an apocalyptic number.

It is an amenable number.

221200011101 is a deficient number, since it is larger than the sum of its proper divisors (14477794339).

221200011101 is a wasteful number, since it uses less digits than its factorization.

221200011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26465 (or 26442 counting only the distinct ones).

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

Adding to 221200011101 its reverse (101110002122), we get a palindrome (322310013223).

The spelling of 221200011101 in words is "two hundred twenty-one billion, two hundred million, eleven thousand, one hundred one".