131131321229 has 2 divisors, whose sum is σ = 131131321230. Its totient is φ = 131131321228.

The previous prime is 131131321141. The next prime is 131131321283. The reversal of 131131321229 is 922123131131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119023620004 + 12107701225 = 344998^2 + 110035^2 .

It is a cyclic number.

It is not a de Polignac number, because 131131321229 - 2⁸ = 131131320973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131131321289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65565660614 + 65565660615.

It is an arithmetic number, because the mean of its divisors is an integer number (65565660615).

Almost surely, 2^131131321229 is an apocalyptic number.

It is an amenable number.

131131321229 is a deficient number, since it is larger than the sum of its proper divisors (1).

131131321229 is an equidigital number, since it uses as much as digits as its factorization.

131131321229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The spelling of 131131321229 in words is "one hundred thirty-one billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred twenty-nine".