131213333321 has 6 divisors (see below), whose sum is σ = 152635918410. Its totient is φ = 112468571376.

The previous prime is 131213333299. The next prime is 131213333327. The reversal of 131213333321 is 123333312131.

It can be written as a sum of positive squares in only one way, i.e., 94747611721 + 36465721600 = 307811^2 + 190960^2 .

It is a de Polignac number, because none of the positive numbers 2^k-131213333321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131213333327) 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 5 ways as a sum of consecutive naturals, for example, 1338911516 + ... + 1338911613.

It is an arithmetic number, because the mean of its divisors is an integer number (25439319735).

Almost surely, 2^131213333321 is an apocalyptic number.

It is an amenable number.

131213333321 is a deficient number, since it is larger than the sum of its proper divisors (21422585089).

131213333321 is an equidigital number, since it uses as much as digits as its factorization.

131213333321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677823143 (or 2677823136 counting only the distinct ones).

The product of its digits is 2916, while the sum is 26.

Adding to 131213333321 its reverse (123333312131), we get a palindrome (254546645452).

The spelling of 131213333321 in words is "one hundred thirty-one billion, two hundred thirteen million, three hundred thirty-three thousand, three hundred twenty-one".