221021111082011 has 2 divisors, whose sum is σ = 221021111082012. Its totient is φ = 221021111082010.

The previous prime is 221021111082007. The next prime is 221021111082017. The reversal of 221021111082011 is 110280111120122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221021111082011 - 2² = 221021111082007 is a prime.

It is not a weakly prime, because it can be changed into another prime (221021111082017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510555541005 + 110510555541006.

It is an arithmetic number, because the mean of its divisors is an integer number (110510555541006).

Almost surely, 2^{221021111082011} is an apocalyptic number.

221021111082011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021111082011 is an equidigital number, since it uses as much as digits as its factorization.

221021111082011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 23.

The spelling of 221021111082011 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred eleven million, eighty-two thousand, eleven".