12001111131 has 16 divisors (see below), whose sum is σ = 16126611200. Its totient is φ = 7938247968.

The previous prime is 12001111091. The next prime is 12001111141. The reversal of 12001111131 is 13111110021.

It is not a de Polignac number, because 12001111131 - 2¹¹ = 12001109083 is a prime.

It is a super-2 number, since 2×12001111131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001111141) 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, 737970 + ... + 754056.

It is an arithmetic number, because the mean of its divisors is an integer number (1007913200).

Almost surely, 2^12001111131 is an apocalyptic number.

12001111131 is a deficient number, since it is larger than the sum of its proper divisors (4125500069).

12001111131 is a wasteful number, since it uses less digits than its factorization.

12001111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18018.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 12001111131 its reverse (13111110021), we get a palindrome (25112221152).

The spelling of 12001111131 in words is "twelve billion, one million, one hundred eleven thousand, one hundred thirty-one".