131021000321 has 2 divisors, whose sum is σ = 131021000322. Its totient is φ = 131021000320.

The previous prime is 131021000309. The next prime is 131021000333. The reversal of 131021000321 is 123000120131.

It is a balanced prime because it is at equal distance from previous prime (131021000309) and next prime (131021000333).

It can be written as a sum of positive squares in only one way, i.e., 125627713600 + 5393286721 = 354440^2 + 73439^2 .

It is a cyclic number.

It is not a de Polignac number, because 131021000321 - 2²⁶ = 130953891457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131021000296 and 131021000305.

It is not a weakly prime, because it can be changed into another prime (131021000021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65510500160 + 65510500161.

It is an arithmetic number, because the mean of its divisors is an integer number (65510500161).

Almost surely, 2^131021000321 is an apocalyptic number.

It is an amenable number.

131021000321 is a deficient number, since it is larger than the sum of its proper divisors (1).

131021000321 is an equidigital number, since it uses as much as digits as its factorization.

131021000321 is an evil number, because the sum of its binary digits is even.

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

Adding to 131021000321 its reverse (123000120131), we get a palindrome (254021120452).

The spelling of 131021000321 in words is "one hundred thirty-one billion, twenty-one million, three hundred twenty-one", and thus it is an aban number.