131232412443221 has 16 divisors (see below), whose sum is σ = 141502140690240. Its totient is φ = 121305105290880.

The previous prime is 131232412443149. The next prime is 131232412443247. The reversal of 131232412443221 is 122344214232131.

It is a cyclic number.

It is not a de Polignac number, because 131232412443221 - 2¹⁸ = 131232412181077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131232412443271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84580400 + ... + 86117993.

It is an arithmetic number, because the mean of its divisors is an integer number (8843883793140).

Almost surely, 2^{131232412443221} is an apocalyptic number.

It is an amenable number.

131232412443221 is a deficient number, since it is larger than the sum of its proper divisors (10269728247019).

131232412443221 is a wasteful number, since it uses less digits than its factorization.

131232412443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170699396.

The product of its digits is 55296, while the sum is 35.

Adding to 131232412443221 its reverse (122344214232131), we get a palindrome (253576626675352).

The spelling of 131232412443221 in words is "one hundred thirty-one trillion, two hundred thirty-two billion, four hundred twelve million, four hundred forty-three thousand, two hundred twenty-one".