503261301421 has 2 divisors, whose sum is σ = 503261301422. Its totient is φ = 503261301420.

The previous prime is 503261301379. The next prime is 503261301467. The reversal of 503261301421 is 124103162305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 327041015625 + 176220285796 = 571875^2 + 419786^2 .

It is a cyclic number.

It is not a de Polignac number, because 503261301421 - 2³¹ = 501113817773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 503261301421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503261304421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251630650710 + 251630650711.

It is an arithmetic number, because the mean of its divisors is an integer number (251630650711).

Almost surely, 2^503261301421 is an apocalyptic number.

It is an amenable number.

503261301421 is a deficient number, since it is larger than the sum of its proper divisors (1).

503261301421 is an equidigital number, since it uses as much as digits as its factorization.

503261301421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 503261301421 its reverse (124103162305), we get a palindrome (627364463726).

The spelling of 503261301421 in words is "five hundred three billion, two hundred sixty-one million, three hundred one thousand, four hundred twenty-one".