221311130111 has 2 divisors, whose sum is σ = 221311130112. Its totient is φ = 221311130110.

The previous prime is 221311130083. The next prime is 221311130113. The reversal of 221311130111 is 111031113122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221311130111 is a prime.

It is a super-2 number, since 2×221311130111² (a number of 23 digits) contains 22 as substring.

Together with 221311130113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221311130111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221311130113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110655565055 + 110655565056.

It is an arithmetic number, because the mean of its divisors is an integer number (110655565056).

Almost surely, 2^221311130111 is an apocalyptic number.

221311130111 is a deficient number, since it is larger than the sum of its proper divisors (1).

221311130111 is an equidigital number, since it uses as much as digits as its factorization.

221311130111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 221311130111 its reverse (111031113122), we get a palindrome (332342243233).

The spelling of 221311130111 in words is "two hundred twenty-one billion, three hundred eleven million, one hundred thirty thousand, one hundred eleven".