11112121311 has 16 divisors (see below), whose sum is σ = 15540363264. Its totient is φ = 7054500384.

The previous prime is 11112121271. The next prime is 11112121327. The reversal of 11112121311 is 11312121111.

It is not a de Polignac number, because 11112121311 - 2¹⁰ = 11112120287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112121331) 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 in 15 ways as a sum of consecutive naturals, for example, 1059775 + ... + 1070208.

It is an arithmetic number, because the mean of its divisors is an integer number (971272704).

Almost surely, 2^11112121311 is an apocalyptic number.

11112121311 is a deficient number, since it is larger than the sum of its proper divisors (4428241953).

11112121311 is a wasteful number, since it uses less digits than its factorization.

11112121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130070.

The product of its digits is 12, while the sum is 15.

Adding to 11112121311 its reverse (11312121111), we get a palindrome (22424242422).

The spelling of 11112121311 in words is "eleven billion, one hundred twelve million, one hundred twenty-one thousand, three hundred eleven".