12123031231131 has 16 divisors (see below), whose sum is σ = 16929528042240. Its totient is φ = 7701890203040.

The previous prime is 12123031231067. The next prime is 12123031231133. The reversal of 12123031231131 is 13113213032121.

It is a cyclic number.

It is not a de Polignac number, because 12123031231131 - 2⁶ = 12123031231067 is a prime.

It is a super-2 number, since 2×12123031231131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12123031231133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326554125 + ... + 326591246.

It is an arithmetic number, because the mean of its divisors is an integer number (1058095502640).

Almost surely, 2^{12123031231131} is an apocalyptic number.

12123031231131 is a deficient number, since it is larger than the sum of its proper divisors (4806496811109).

12123031231131 is a wasteful number, since it uses less digits than its factorization.

12123031231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653145666.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 12123031231131 its reverse (13113213032121), we get a palindrome (25236244263252).

The spelling of 12123031231131 in words is "twelve trillion, one hundred twenty-three billion, thirty-one million, two hundred thirty-one thousand, one hundred thirty-one".