11111011131 has 8 divisors (see below), whose sum is σ = 16161470784. Its totient is φ = 6733946120.

The previous prime is 11111011123. The next prime is 11111011133. The reversal of 11111011131 is 13111011111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11111011131 - 2³ = 11111011123 is a prime.

It is a super-2 number, since 2×11111011131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11111011133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168348621 + ... + 168348686.

It is an arithmetic number, because the mean of its divisors is an integer number (2020183848).

Almost surely, 2^11111011131 is an apocalyptic number.

11111011131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111011131 is a deficient number, since it is larger than the sum of its proper divisors (5050459653).

11111011131 is a wasteful number, since it uses less digits than its factorization.

11111011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336697321.

The product of its (nonzero) digits is 3, while the sum is 12.

Adding to 11111011131 its reverse (13111011111), we get a palindrome (24222022242).

The spelling of 11111011131 in words is "eleven billion, one hundred eleven million, eleven thousand, one hundred thirty-one".