131212442302121 has 4 divisors (see below), whose sum is σ = 131330758301700. Its totient is φ = 131094126302544.

The previous prime is 131212442302033. The next prime is 131212442302129. The reversal of 131212442302121 is 121203244212131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6200722515625 + 125011719786496 = 2490125^2 + 11180864^2 .

It is a cyclic number.

It is not a de Polignac number, because 131212442302121 - 2⁴⁶ = 60843698124457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131212442302129) 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, 59157998126 + ... + 59158000343.

It is an arithmetic number, because the mean of its divisors is an integer number (32832689575425).

Almost surely, 2^{131212442302121} is an apocalyptic number.

It is an amenable number.

131212442302121 is a deficient number, since it is larger than the sum of its proper divisors (118315999579).

131212442302121 is a wasteful number, since it uses less digits than its factorization.

131212442302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118315999578.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 131212442302121 its reverse (121203244212131), we get a palindrome (252415686514252).

The spelling of 131212442302121 in words is "one hundred thirty-one trillion, two hundred twelve billion, four hundred forty-two million, three hundred two thousand, one hundred twenty-one".