131212521211 has 8 divisors (see below), whose sum is σ = 138121819920. Its totient is φ = 124303560192.

The previous prime is 131212521071. The next prime is 131212521263. The reversal of 131212521211 is 112125212131.

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 131212521211 - 2²⁷ = 131078303483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131212521311) 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, 1272651 + ... + 1371883.

It is an arithmetic number, because the mean of its divisors is an integer number (17265227490).

Almost surely, 2^131212521211 is an apocalyptic number.

131212521211 is a deficient number, since it is larger than the sum of its proper divisors (6909298709).

131212521211 is an equidigital number, since it uses as much as digits as its factorization.

131212521211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168845.

The product of its digits is 240, while the sum is 22.

Adding to 131212521211 its reverse (112125212131), we get a palindrome (243337733342).

The spelling of 131212521211 in words is "one hundred thirty-one billion, two hundred twelve million, five hundred twenty-one thousand, two hundred eleven".