131212031111 has 8 divisors (see below), whose sum is σ = 150497968800. Its totient is φ = 112061433888.

The previous prime is 131212031101. The next prime is 131212031143. The reversal of 131212031111 is 111130212131.

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 131212031111 - 2²² = 131207836807 is a prime.

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 131212031111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131212031101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33833036 + ... + 33836913.

It is an arithmetic number, because the mean of its divisors is an integer number (18812246100).

Almost surely, 2^131212031111 is an apocalyptic number.

131212031111 is a deficient number, since it is larger than the sum of its proper divisors (19285937689).

131212031111 is an equidigital number, since it uses as much as digits as its factorization.

131212031111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67670233.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 131212031111 its reverse (111130212131), we get a palindrome (242342243242).

The spelling of 131212031111 in words is "one hundred thirty-one billion, two hundred twelve million, thirty-one thousand, one hundred eleven".