1361316215421 has 6 divisors (see below), whose sum is σ = 1966345644510. Its totient is φ = 907544143608.

The previous prime is 1361316215353. The next prime is 1361316215437. The reversal of 1361316215421 is 1245126131631.

1361316215421 is a `hidden beast` number, since 1 + 3 + 6 + 1 + 3 + 1 + 621 + 5 + 4 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1264019009796 + 97297205625 = 1124286^2 + 311925^2 .

It is not a de Polignac number, because 1361316215421 - 2¹⁰ = 1361316214397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361316219421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75628678626 + ... + 75628678643.

It is an arithmetic number, because the mean of its divisors is an integer number (327724274085).

Almost surely, 2^{1361316215421} is an apocalyptic number.

It is an amenable number.

1361316215421 is a deficient number, since it is larger than the sum of its proper divisors (605029429089).

1361316215421 is a wasteful number, since it uses less digits than its factorization.

1361316215421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151257357275 (or 151257357272 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 1361316215421 in words is "one trillion, three hundred sixty-one billion, three hundred sixteen million, two hundred fifteen thousand, four hundred twenty-one".