221121110011 has 2 divisors, whose sum is σ = 221121110012. Its totient is φ = 221121110010.

The previous prime is 221121110009. The next prime is 221121110053. The reversal of 221121110011 is 110011121122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221121110011 - 2¹ = 221121110009 is a prime.

Together with 221121110009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221121109973 and 221121110000.

It is not a weakly prime, because it can be changed into another prime (221121110611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560555005 + 110560555006.

It is an arithmetic number, because the mean of its divisors is an integer number (110560555006).

Almost surely, 2^221121110011 is an apocalyptic number.

221121110011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121110011 is an equidigital number, since it uses as much as digits as its factorization.

221121110011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221121110011 its reverse (110011121122), we get a palindrome (331132231133).

It can be divided in two parts, 2211211 and 10011, that added together give a palindrome (2221222).

The spelling of 221121110011 in words is "two hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, eleven".