131021303 has 4 divisors (see below), whose sum is σ = 149738640. Its totient is φ = 112303968.

The previous prime is 131021291. The next prime is 131021309. The reversal of 131021303 is 303120131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303120131 = 3457 ⋅87683.

It is not a de Polignac number, because 131021303 - 2⁴ = 131021287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021309) 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, 9358658 + ... + 9358671.

It is an arithmetic number, because the mean of its divisors is an integer number (37434660).

Almost surely, 2^131021303 is an apocalyptic number.

131021303 is a deficient number, since it is larger than the sum of its proper divisors (18717337).

131021303 is an equidigital number, since it uses as much as digits as its factorization.

131021303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18717336.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 131021303 is about 11446.4537303044. The cubic root of 131021303 is about 507.9028362643.

Adding to 131021303 its reverse (303120131), we get a palindrome (434141434).

The spelling of 131021303 in words is "one hundred thirty-one million, twenty-one thousand, three hundred three".