131102321 has 4 divisors (see below), whose sum is σ = 149831232. Its totient is φ = 112373412.

The previous prime is 131102303. The next prime is 131102327. The reversal of 131102321 is 123201131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131102321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131102296 and 131102305.

It is not an unprimeable number, because it can be changed into a prime (131102327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9364445 + ... + 9364458.

It is an arithmetic number, because the mean of its divisors is an integer number (37457808).

Almost surely, 2^131102321 is an apocalyptic number.

It is an amenable number.

131102321 is a deficient number, since it is larger than the sum of its proper divisors (18728911).

131102321 is an equidigital number, since it uses as much as digits as its factorization.

131102321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18728910.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131102321 is about 11449.9921834034. The cubic root of 131102321 is about 508.0075031959.

Adding to 131102321 its reverse (123201131), we get a palindrome (254303452).

The spelling of 131102321 in words is "one hundred thirty-one million, one hundred two thousand, three hundred twenty-one".