12142211131 has 4 divisors (see below), whose sum is σ = 12438362664. Its totient is φ = 11846059600.

The previous prime is 12142211063. The next prime is 12142211167. The reversal of 12142211131 is 13111224121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12142211131 is a prime.

It is a super-2 number, since 2×12142211131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12142211099 and 12142211108.

It is not an unprimeable number, because it can be changed into a prime (12142241131) 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, 148075705 + ... + 148075786.

It is an arithmetic number, because the mean of its divisors is an integer number (3109590666).

Almost surely, 2^12142211131 is an apocalyptic number.

12142211131 is a deficient number, since it is larger than the sum of its proper divisors (296151533).

12142211131 is an equidigital number, since it uses as much as digits as its factorization.

12142211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296151532.

The product of its digits is 96, while the sum is 19.

Adding to 12142211131 its reverse (13111224121), we get a palindrome (25253435252).

The spelling of 12142211131 in words is "twelve billion, one hundred forty-two million, two hundred eleven thousand, one hundred thirty-one".