131321101 has 2 divisors, whose sum is σ = 131321102. Its totient is φ = 131321100.

The previous prime is 131321083. The next prime is 131321131. The reversal of 131321101 is 101123131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105575625 + 25745476 = 10275^2 + 5074^2 .

It is a cyclic number.

It is not a de Polignac number, because 131321101 - 2¹⁷ = 131190029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131321131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660550 + 65660551.

It is an arithmetic number, because the mean of its divisors is an integer number (65660551).

Almost surely, 2^131321101 is an apocalyptic number.

It is an amenable number.

131321101 is a deficient number, since it is larger than the sum of its proper divisors (1).

131321101 is an equidigital number, since it uses as much as digits as its factorization.

131321101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 131321101 is about 11459.5419192915. The cubic root of 131321101 is about 508.2899292033.

Adding to 131321101 its reverse (101123131), we get a palindrome (232444232).

The spelling of 131321101 in words is "one hundred thirty-one million, three hundred twenty-one thousand, one hundred one".