12011232131 has 8 divisors (see below), whose sum is σ = 12411491328. Its totient is φ = 11611773000.

The previous prime is 12011232119. The next prime is 12011232143. The reversal of 12011232131 is 13123211021.

It is an interprime number because it is at equal distance from previous prime (12011232119) and next prime (12011232143).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12011232131 - 2¹⁸ = 12010969987 is a prime.

It is a super-2 number, since 2×12011232131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12011232161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169415 + ... + 229616.

It is an arithmetic number, because the mean of its divisors is an integer number (1551436416).

Almost surely, 2^12011232131 is an apocalyptic number.

12011232131 is a deficient number, since it is larger than the sum of its proper divisors (400259197).

12011232131 is an equidigital number, since it uses as much as digits as its factorization.

12011232131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400033.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12011232131 its reverse (13123211021), we get a palindrome (25134443152).

The spelling of 12011232131 in words is "twelve billion, eleven million, two hundred thirty-two thousand, one hundred thirty-one".