131321103 has 32 divisors (see below), whose sum is σ = 192176640. Its totient is φ = 79470720.

The previous prime is 131321101. The next prime is 131321131. The reversal of 131321103 is 301123131.

It is not a de Polignac number, because 131321103 - 2¹ = 131321101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149301 + ... + 150177.

It is an arithmetic number, because the mean of its divisors is an integer number (6005520).

Almost surely, 2^131321103 is an apocalyptic number.

131321103 is a deficient number, since it is larger than the sum of its proper divisors (60855537).

131321103 is a wasteful number, since it uses less digits than its factorization.

131321103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 131321103 is about 11459.5420065551. The cubic root of 131321103 is about 508.2899317837.

Adding to 131321103 its reverse (301123131), we get a palindrome (432444234).

The spelling of 131321103 in words is "one hundred thirty-one million, three hundred twenty-one thousand, one hundred three".