131221011113 has 8 divisors (see below), whose sum is σ = 132935077632. Its totient is φ = 129514317696.

The previous prime is 131221011067. The next prime is 131221011139. The reversal of 131221011113 is 311110122131.

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 131221011113 - 2⁸ = 131221010857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131221011091 and 131221011100.

It is not an unprimeable number, because it can be changed into a prime (131221011143) 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, 1807445 + ... + 1878642.

It is an arithmetic number, because the mean of its divisors is an integer number (16616884704).

Almost surely, 2^131221011113 is an apocalyptic number.

It is an amenable number.

131221011113 is a deficient number, since it is larger than the sum of its proper divisors (1714066519).

131221011113 is an equidigital number, since it uses as much as digits as its factorization.

131221011113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686551.

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

Adding to 131221011113 its reverse (311110122131), we get a palindrome (442331133244).

The spelling of 131221011113 in words is "one hundred thirty-one billion, two hundred twenty-one million, eleven thousand, one hundred thirteen".