12103011131 has 4 divisors (see below), whose sum is σ = 12104334600. Its totient is φ = 12101687664.

The previous prime is 12103011101. The next prime is 12103011143. The reversal of 12103011131 is 13111030121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13111030121 = 7 ⋅1873004303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12103011131 is a prime.

It is a super-2 number, since 2×12103011131² (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 (12103011101) 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, 647921 + ... + 666338.

It is an arithmetic number, because the mean of its divisors is an integer number (3026083650).

Almost surely, 2^12103011131 is an apocalyptic number.

12103011131 is a deficient number, since it is larger than the sum of its proper divisors (1323469).

12103011131 is an equidigital number, since it uses as much as digits as its factorization.

12103011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323468.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 12103011131 its reverse (13111030121), we get a palindrome (25214041252).

The spelling of 12103011131 in words is "twelve billion, one hundred three million, eleven thousand, one hundred thirty-one".