11201211111111 has 16 divisors (see below), whose sum is σ = 17619109337088. Its totient is φ = 6194218125600.

The previous prime is 11201211111017. The next prime is 11201211111113. The reversal of 11201211111111 is 11111111210211.

It is a happy number.

It is not a de Polignac number, because 11201211111111 - 2¹³ = 11201211102919 is a prime.

11201211111111 is a modest number, since divided by 11111111 gives 112012 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201211111113) 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, 8603080080 + ... + 8603081381.

It is an arithmetic number, because the mean of its divisors is an integer number (1101194333568).

Almost surely, 2^{11201211111111} is an apocalyptic number.

11201211111111 is a deficient number, since it is larger than the sum of its proper divisors (6417898225977).

11201211111111 is a wasteful number, since it uses less digits than its factorization.

11201211111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17206161502.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 11201211111111 its reverse (11111111210211), we get a palindrome (22312322321322).

The spelling of 11201211111111 in words is "eleven trillion, two hundred one billion, two hundred eleven million, one hundred eleven thousand, one hundred eleven".