221021120011 has 2 divisors, whose sum is σ = 221021120012. Its totient is φ = 221021120010.

The previous prime is 221021119997. The next prime is 221021120017. The reversal of 221021120011 is 110021120122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221021120011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221021119973 and 221021120000.

It is not a weakly prime, because it can be changed into another prime (221021120017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510560005 + 110510560006.

It is an arithmetic number, because the mean of its divisors is an integer number (110510560006).

Almost surely, 2^221021120011 is an apocalyptic number.

221021120011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021120011 is an equidigital number, since it uses as much as digits as its factorization.

221021120011 is an evil number, because the sum of its binary digits is even.

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

Adding to 221021120011 its reverse (110021120122), we get a palindrome (331042240133).

The spelling of 221021120011 in words is "two hundred twenty-one billion, twenty-one million, one hundred twenty thousand, eleven".