12013131 has 16 divisors (see below), whose sum is σ = 17448480. Its totient is φ = 7307520.

The previous prime is 12013117. The next prime is 12013189. The reversal of 12013131 is 13131021.

It is not a de Polignac number, because 12013131 - 2⁹ = 12012619 is a prime.

It is a super-2 number, since 2×12013131² = 288630632846322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12013531) 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, 1741 + ... + 5201.

It is an arithmetic number, because the mean of its divisors is an integer number (1090530).

Almost surely, 2^12013131 is an apocalyptic number.

12013131 is a deficient number, since it is larger than the sum of its proper divisors (5435349).

12013131 is a wasteful number, since it uses less digits than its factorization.

12013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 12013131 is about 3465.9963935353. The cubic root of 12013131 is about 229.0263249740.

Adding to 12013131 its reverse (13131021), we get a palindrome (25144152).

The spelling of 12013131 in words is "twelve million, thirteen thousand, one hundred thirty-one".