131321020121303 has 4 divisors (see below), whose sum is σ = 132595981481808. Its totient is φ = 130046058760800.

The previous prime is 131321020121281. The next prime is 131321020121309. The reversal of 131321020121303 is 303121020123131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131321020121303 - 2¹² = 131321020117207 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 (131321020121309) 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, 637480680098 + ... + 637480680303.

It is an arithmetic number, because the mean of its divisors is an integer number (33148995370452).

Almost surely, 2^{131321020121303} is an apocalyptic number.

131321020121303 is a deficient number, since it is larger than the sum of its proper divisors (1274961360505).

131321020121303 is a wasteful number, since it uses less digits than its factorization.

131321020121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274961360504.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 131321020121303 its reverse (303121020123131), we get a palindrome (434442040244434).

The spelling of 131321020121303 in words is "one hundred thirty-one trillion, three hundred twenty-one billion, twenty million, one hundred twenty-one thousand, three hundred three".