11201215511 has 2 divisors, whose sum is σ = 11201215512. Its totient is φ = 11201215510.

The previous prime is 11201215471. The next prime is 11201215547. The reversal of 11201215511 is 11551210211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11201215511 - 2⁶ = 11201215447 is a prime.

It is a super-3 number, since 3×11201215511³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201215591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600607755 + 5600607756.

It is an arithmetic number, because the mean of its divisors is an integer number (5600607756).

Almost surely, 2^11201215511 is an apocalyptic number.

11201215511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201215511 is an equidigital number, since it uses as much as digits as its factorization.

11201215511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 20.

Adding to 11201215511 its reverse (11551210211), we get a palindrome (22752425722).

The spelling of 11201215511 in words is "eleven billion, two hundred one million, two hundred fifteen thousand, five hundred eleven".