131211111337 has 2 divisors, whose sum is σ = 131211111338. Its totient is φ = 131211111336.

The previous prime is 131211111281. The next prime is 131211111377. The reversal of 131211111337 is 733111112131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71259099136 + 59952012201 = 266944^2 + 244851^2 .

It is an emirp because it is prime and its reverse (733111112131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131211111337 - 2⁷ = 131211111209 is a prime.

It is not a weakly prime, because it can be changed into another prime (131211111377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605555668 + 65605555669.

It is an arithmetic number, because the mean of its divisors is an integer number (65605555669).

Almost surely, 2^131211111337 is an apocalyptic number.

It is an amenable number.

131211111337 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211111337 is an equidigital number, since it uses as much as digits as its factorization.

131211111337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 25.

Adding to 131211111337 its reverse (733111112131), we get a palindrome (864322223468).

The spelling of 131211111337 in words is "one hundred thirty-one billion, two hundred eleven million, one hundred eleven thousand, three hundred thirty-seven".