221200011011 has 24 divisors (see below), whose sum is σ = 267243287040. Its totient is φ = 182420668752.

The previous prime is 221200010987. The next prime is 221200011041. The reversal of 221200011011 is 110110002122.

It is a de Polignac number, because none of the positive numbers 2^k-221200011011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221200010983 and 221200011001.

It is not an unprimeable number, because it can be changed into a prime (221200011041) 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, 678095 + ... + 949848.

It is an arithmetic number, because the mean of its divisors is an integer number (11135136960).

Almost surely, 2^221200011011 is an apocalyptic number.

221200011011 is a deficient number, since it is larger than the sum of its proper divisors (46043276029).

221200011011 is a wasteful number, since it uses less digits than its factorization.

221200011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628063 (or 1628056 counting only the distinct ones).

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

Adding to 221200011011 its reverse (110110002122), we get a palindrome (331310013133).

The spelling of 221200011011 in words is "two hundred twenty-one billion, two hundred million, eleven thousand, eleven".