421231143013 has 2 divisors, whose sum is σ = 421231143014. Its totient is φ = 421231143012.

The previous prime is 421231143007. The next prime is 421231143017. The reversal of 421231143013 is 310341132124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393019909569 + 28211233444 = 626913^2 + 167962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421231143013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421231143017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210615571506 + 210615571507.

It is an arithmetic number, because the mean of its divisors is an integer number (210615571507).

Almost surely, 2^421231143013 is an apocalyptic number.

It is an amenable number.

421231143013 is a deficient number, since it is larger than the sum of its proper divisors (1).

421231143013 is an equidigital number, since it uses as much as digits as its factorization.

421231143013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 421231143013 its reverse (310341132124), we get a palindrome (731572275137).

The spelling of 421231143013 in words is "four hundred twenty-one billion, two hundred thirty-one million, one hundred forty-three thousand, thirteen".