1131130111111 has 32 divisors (see below), whose sum is σ = 1519200377856. Its totient is φ = 813342816000.

The previous prime is 1131130111109. The next prime is 1131130111183. The reversal of 1131130111111 is 1111110311311.

It is a happy number.

It is not a de Polignac number, because 1131130111111 - 2¹ = 1131130111109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131130114111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3017131 + ... + 3371251.

It is an arithmetic number, because the mean of its divisors is an integer number (47475011808).

Almost surely, 2^{1131130111111} is an apocalyptic number.

1131130111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131130111111 is a deficient number, since it is larger than the sum of its proper divisors (388070266745).

1131130111111 is a wasteful number, since it uses less digits than its factorization.

1131130111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357343.

The product of its (nonzero) digits is 9, while the sum is 16.

Adding to 1131130111111 its reverse (1111110311311), we get a palindrome (2242240422422).

The spelling of 1131130111111 in words is "one trillion, one hundred thirty-one billion, one hundred thirty million, one hundred eleven thousand, one hundred eleven".