221211020011 has 2 divisors, whose sum is σ = 221211020012. Its totient is φ = 221211020010.

The previous prime is 221211019979. The next prime is 221211020027. The reversal of 221211020011 is 110020112122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221211020011 - 2⁵ = 221211019979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221211019973 and 221211020000.

It is not a weakly prime, because it can be changed into another prime (221211000011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605510005 + 110605510006.

It is an arithmetic number, because the mean of its divisors is an integer number (110605510006).

Almost surely, 2^221211020011 is an apocalyptic number.

221211020011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211020011 is an equidigital number, since it uses as much as digits as its factorization.

221211020011 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 221211020011 its reverse (110020112122), we get a palindrome (331231132133).

The spelling of 221211020011 in words is "two hundred twenty-one billion, two hundred eleven million, twenty thousand, eleven".