131221341212213 has 4 divisors (see below), whose sum is σ = 149967247099680. Its totient is φ = 112475435324748.

The previous prime is 131221341212207. The next prime is 131221341212249. The reversal of 131221341212213 is 312212143122131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131221341212213 - 2⁶ = 131221341212149 is a prime.

It is a super-3 number, since 3×131221341212213³ (a number of 43 digits) contains 333 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 (131221341212813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9372952943723 + ... + 9372952943736.

It is an arithmetic number, because the mean of its divisors is an integer number (37491811774920).

Almost surely, 2^{131221341212213} is an apocalyptic number.

It is an amenable number.

131221341212213 is a deficient number, since it is larger than the sum of its proper divisors (18745905887467).

131221341212213 is an equidigital number, since it uses as much as digits as its factorization.

131221341212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18745905887466.

The product of its digits is 3456, while the sum is 29.

Adding to 131221341212213 its reverse (312212143122131), we get a palindrome (443433484334344).

The spelling of 131221341212213 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred forty-one million, two hundred twelve thousand, two hundred thirteen".