11123101131 has 4 divisors (see below), whose sum is σ = 14830801512. Its totient is φ = 7415400752.

The previous prime is 11123101123. The next prime is 11123101141. The reversal of 11123101131 is 13110132111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11123101131 - 2³ = 11123101123 is a prime.

It is a super-2 number, since 2×11123101131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11123101131.

It is not an unprimeable number, because it can be changed into a prime (11123101111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853850186 + ... + 1853850191.

It is an arithmetic number, because the mean of its divisors is an integer number (3707700378).

Almost surely, 2^11123101131 is an apocalyptic number.

11123101131 is a deficient number, since it is larger than the sum of its proper divisors (3707700381).

11123101131 is an equidigital number, since it uses as much as digits as its factorization.

11123101131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707700380.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 11123101131 its reverse (13110132111), we get a palindrome (24233233242).

The spelling of 11123101131 in words is "eleven billion, one hundred twenty-three million, one hundred one thousand, one hundred thirty-one".