131234432129 has 2 divisors, whose sum is σ = 131234432130. Its totient is φ = 131234432128.

The previous prime is 131234432123. The next prime is 131234432183. The reversal of 131234432129 is 921234432131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129715225600 + 1519206529 = 360160^2 + 38977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131234432129 is a prime.

It is a super-2 number, since 2×131234432129² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131234432123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65617216064 + 65617216065.

It is an arithmetic number, because the mean of its divisors is an integer number (65617216065).

Almost surely, 2^131234432129 is an apocalyptic number.

It is an amenable number.

131234432129 is a deficient number, since it is larger than the sum of its proper divisors (1).

131234432129 is an equidigital number, since it uses as much as digits as its factorization.

131234432129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The spelling of 131234432129 in words is "one hundred thirty-one billion, two hundred thirty-four million, four hundred thirty-two thousand, one hundred twenty-nine".