13131230020421 has 2 divisors, whose sum is σ = 13131230020422. Its totient is φ = 13131230020420.

The previous prime is 13131230020411. The next prime is 13131230020427. The reversal of 13131230020421 is 12402003213131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12503508160900 + 627721859521 = 3536030^2 + 792289^2 .

It is a cyclic number.

It is not a de Polignac number, because 13131230020421 - 2²⁶ = 13131162911557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13131230020427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565615010210 + 6565615010211.

It is an arithmetic number, because the mean of its divisors is an integer number (6565615010211).

Almost surely, 2^{13131230020421} is an apocalyptic number.

It is an amenable number.

13131230020421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13131230020421 is an equidigital number, since it uses as much as digits as its factorization.

13131230020421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 13131230020421 its reverse (12402003213131), we get a palindrome (25533233233552).

The spelling of 13131230020421 in words is "thirteen trillion, one hundred thirty-one billion, two hundred thirty million, twenty thousand, four hundred twenty-one".