13451224621 has 2 divisors, whose sum is σ = 13451224622. Its totient is φ = 13451224620.

The previous prime is 13451224583. The next prime is 13451224637. The reversal of 13451224621 is 12642215431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10447088521 + 3004136100 = 102211^2 + 54810^2 .

It is a cyclic number.

It is not a de Polignac number, because 13451224621 - 2¹¹ = 13451222573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13451224651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6725612310 + 6725612311.

It is an arithmetic number, because the mean of its divisors is an integer number (6725612311).

Almost surely, 2^13451224621 is an apocalyptic number.

It is an amenable number.

13451224621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13451224621 is an equidigital number, since it uses as much as digits as its factorization.

13451224621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The spelling of 13451224621 in words is "thirteen billion, four hundred fifty-one million, two hundred twenty-four thousand, six hundred twenty-one".