12131131211111 has 8 divisors (see below), whose sum is σ = 13364990642448. Its totient is φ = 10919110000000.

The previous prime is 12131131211057. The next prime is 12131131211119. The reversal of 12131131211111 is 11111213113121.

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

It is not a de Polignac number, because 12131131211111 - 2¹⁸ = 12131130948967 is a prime.

It is a super-2 number, since 2×12131131211111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131131211119) 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, 5459553890 + ... + 5459556111.

It is an arithmetic number, because the mean of its divisors is an integer number (1670623830306).

Almost surely, 2^{12131131211111} is an apocalyptic number.

12131131211111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12131131211111 is a deficient number, since it is larger than the sum of its proper divisors (1233859431337).

12131131211111 is a wasteful number, since it uses less digits than its factorization.

12131131211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10919110113.

The product of its digits is 36, while the sum is 20.

Adding to 12131131211111 its reverse (11111213113121), we get a palindrome (23242344324232).

It can be divided in two parts, 1213113121 and 1111, that multiplied together give a palindrome (1347768677431).

The spelling of 12131131211111 in words is "twelve trillion, one hundred thirty-one billion, one hundred thirty-one million, two hundred eleven thousand, one hundred eleven".