12145031111 has 4 divisors (see below), whose sum is σ = 12441251424. Its totient is φ = 11848810800.

The previous prime is 12145031077. The next prime is 12145031153. The reversal of 12145031111 is 11113054121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11113054121 = 13 ⋅854850317.

It is a cyclic number.

It is not a de Polignac number, because 12145031111 - 2¹⁸ = 12144768967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145031161) 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, 148110095 + ... + 148110176.

It is an arithmetic number, because the mean of its divisors is an integer number (3110312856).

Almost surely, 2^12145031111 is an apocalyptic number.

12145031111 is a deficient number, since it is larger than the sum of its proper divisors (296220313).

12145031111 is an equidigital number, since it uses as much as digits as its factorization.

12145031111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296220312.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 12145031111 its reverse (11113054121), we get a palindrome (23258085232).

The spelling of 12145031111 in words is "twelve billion, one hundred forty-five million, thirty-one thousand, one hundred eleven".