11220211011511 has 2 divisors, whose sum is σ = 11220211011512. Its totient is φ = 11220211011510.

The previous prime is 11220211011479. The next prime is 11220211011523. The reversal of 11220211011511 is 11511011202211.

11220211011511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11220211011511 - 2⁵ = 11220211011479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220211011551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610105505755 + 5610105505756.

It is an arithmetic number, because the mean of its divisors is an integer number (5610105505756).

Almost surely, 2^{11220211011511} is an apocalyptic number.

11220211011511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220211011511 is an equidigital number, since it uses as much as digits as its factorization.

11220211011511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 19.

Adding to 11220211011511 its reverse (11511011202211), we get a palindrome (22731222213722).

The spelling of 11220211011511 in words is "eleven trillion, two hundred twenty billion, two hundred eleven million, eleven thousand, five hundred eleven".