11221221021011 has 2 divisors, whose sum is σ = 11221221021012. Its totient is φ = 11221221021010.

The previous prime is 11221221020983. The next prime is 11221221021077. The reversal of 11221221021011 is 11012012212211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11221221021011 - 2²⁶ = 11221153912147 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221221021211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610610510505 + 5610610510506.

It is an arithmetic number, because the mean of its divisors is an integer number (5610610510506).

Almost surely, 2^{11221221021011} is an apocalyptic number.

11221221021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221221021011 is an equidigital number, since it uses as much as digits as its factorization.

11221221021011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11221221021011 its reverse (11012012212211), we get a palindrome (22233233233222).

The spelling of 11221221021011 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty-one thousand, eleven".