11211000110021 has 2 divisors, whose sum is σ = 11211000110022. Its totient is φ = 11211000110020.

The previous prime is 11211000109949. The next prime is 11211000110137. The reversal of 11211000110021 is 12001100011211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11008692664225 + 202307445796 = 3317935^2 + 449786^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211000110021 - 2¹⁸ = 11210999847877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211000109984 and 11211000110011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211000119021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605500055010 + 5605500055011.

It is an arithmetic number, because the mean of its divisors is an integer number (5605500055011).

Almost surely, 2^{11211000110021} is an apocalyptic number.

It is an amenable number.

11211000110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211000110021 is an equidigital number, since it uses as much as digits as its factorization.

11211000110021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11211000110021 its reverse (12001100011211), we get a palindrome (23212100121232).

The spelling of 11211000110021 in words is "eleven trillion, two hundred eleven billion, one hundred ten thousand, twenty-one".