13241256561621 has 96 divisors (see below), whose sum is σ = 22571647488000. Its totient is φ = 7395373560960.

The previous prime is 13241256561619. The next prime is 13241256561677. The reversal of 13241256561621 is 12616565214231.

13241256561621 is a `hidden beast` number, since 1 + 3 + 2 + 4 + 1 + 2 + 5 + 6 + 5 + 616 + 21 = 666.

13241256561621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13241256561621 - 2¹ = 13241256561619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13241256560621) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30356730 + ... + 30789828.

It is an arithmetic number, because the mean of its divisors is an integer number (235121328000).

Almost surely, 2^{13241256561621} is an apocalyptic number.

13241256561621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13241256561621 is a deficient number, since it is larger than the sum of its proper divisors (9330390926379).

13241256561621 is a wasteful number, since it uses less digits than its factorization.

13241256561621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433631 (or 433628 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 13241256561621 in words is "thirteen trillion, two hundred forty-one billion, two hundred fifty-six million, five hundred sixty-one thousand, six hundred twenty-one".