11515330421361 has 24 divisors (see below), whose sum is σ = 17924300557800. Its totient is φ = 7081782276096.

The previous prime is 11515330421321. The next prime is 11515330421369. The reversal of 11515330421361 is 16312403351511.

11515330421361 is a `hidden beast` number, since 1 + 1 + 51 + 5 + 330 + 4 + 213 + 61 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2499987888225 + 9015342533136 = 1581135^2 + 3002556^2 .

It is not a de Polignac number, because 11515330421361 - 2¹⁵ = 11515330388593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11515330421369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31588176 + ... + 31950641.

It is an arithmetic number, because the mean of its divisors is an integer number (746845856575).

Almost surely, 2^{11515330421361} is an apocalyptic number.

It is an amenable number.

11515330421361 is a deficient number, since it is larger than the sum of its proper divisors (6408970136439).

11515330421361 is a wasteful number, since it uses less digits than its factorization.

11515330421361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63540385 (or 63540382 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

Adding to 11515330421361 its reverse (16312403351511), we get a palindrome (27827733772872).

The spelling of 11515330421361 in words is "eleven trillion, five hundred fifteen billion, three hundred thirty million, four hundred twenty-one thousand, three hundred sixty-one".