12031201131123 has 4 divisors (see below), whose sum is σ = 16041601508168. Its totient is φ = 8020800754080.

The previous prime is 12031201131121. The next prime is 12031201131151. The reversal of 12031201131123 is 32113110213021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12031201131123 - 2¹ = 12031201131121 is a prime.

It is a super-2 number, since 2×12031201131123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12031201131123.

It is not an unprimeable number, because it can be changed into a prime (12031201131121) 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, 2005200188518 + ... + 2005200188523.

It is an arithmetic number, because the mean of its divisors is an integer number (4010400377042).

Almost surely, 2^{12031201131123} is an apocalyptic number.

12031201131123 is a deficient number, since it is larger than the sum of its proper divisors (4010400377045).

12031201131123 is an equidigital number, since it uses as much as digits as its factorization.

12031201131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010400377044.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 12031201131123 its reverse (32113110213021), we get a palindrome (44144311344144).

The spelling of 12031201131123 in words is "twelve trillion, thirty-one billion, two hundred one million, one hundred thirty-one thousand, one hundred twenty-three".