221011101011 has 2 divisors, whose sum is σ = 221011101012. Its totient is φ = 221011101010.

The previous prime is 221011101001. The next prime is 221011101013. The reversal of 221011101011 is 110101110122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221011101011 - 2¹⁴ = 221011084627 is a prime.

Together with 221011101013, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221011100983 and 221011101001.

It is not a weakly prime, because it can be changed into another prime (221011101013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505550505 + 110505550506.

It is an arithmetic number, because the mean of its divisors is an integer number (110505550506).

Almost surely, 2^221011101011 is an apocalyptic number.

221011101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221011101011 is an equidigital number, since it uses as much as digits as its factorization.

221011101011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 221011101011 its reverse (110101110122), we get a palindrome (331112211133).

The spelling of 221011101011 in words is "two hundred twenty-one billion, eleven million, one hundred one thousand, eleven".