221220110011 has 4 divisors (see below), whose sum is σ = 228356242624. Its totient is φ = 214083977400.

The previous prime is 221220109963. The next prime is 221220110021. The reversal of 221220110011 is 110011022122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221220110011 - 2²⁷ = 221085892283 is a prime.

It is a super-3 number, since 3×221220110011³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221220109973 and 221220110000.

It is not an unprimeable number, because it can be changed into a prime (221220110021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568066260 + ... + 3568066321.

It is an arithmetic number, because the mean of its divisors is an integer number (57089060656).

Almost surely, 2^221220110011 is an apocalyptic number.

221220110011 is a deficient number, since it is larger than the sum of its proper divisors (7136132613).

221220110011 is an equidigital number, since it uses as much as digits as its factorization.

221220110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136132612.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221220110011 its reverse (110011022122), we get a palindrome (331231132133).

The spelling of 221220110011 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred ten thousand, eleven".