11011220211111 has 16 divisors (see below), whose sum is σ = 15322296065760. Its totient is φ = 7024959119360.

The previous prime is 11011220211109. The next prime is 11011220211151. The reversal of 11011220211111 is 11111202211011.

It is a cyclic number.

It is not a de Polignac number, because 11011220211111 - 2¹ = 11011220211109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011220211151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560015610 + ... + 560035271.

It is an arithmetic number, because the mean of its divisors is an integer number (957643504110).

Almost surely, 2^{11011220211111} is an apocalyptic number.

11011220211111 is a deficient number, since it is larger than the sum of its proper divisors (4311075854649).

11011220211111 is a wasteful number, since it uses less digits than its factorization.

11011220211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120051026.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11011220211111 its reverse (11111202211011), we get a palindrome (22122422422122).

The spelling of 11011220211111 in words is "eleven trillion, eleven billion, two hundred twenty million, two hundred eleven thousand, one hundred eleven".