11615313021 has 32 divisors (see below), whose sum is σ = 16931389440. Its totient is φ = 7039747584.

The previous prime is 11615312981. The next prime is 11615313049. The reversal of 11615313021 is 12031351611.

It is not a de Polignac number, because 11615313021 - 2¹⁰ = 11615311997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11615312982 and 11615313000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11615313071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2266500 + ... + 2271618.

It is an arithmetic number, because the mean of its divisors is an integer number (529105920).

Almost surely, 2^11615313021 is an apocalyptic number.

It is an amenable number.

11615313021 is a deficient number, since it is larger than the sum of its proper divisors (5316076419).

11615313021 is a wasteful number, since it uses less digits than its factorization.

11615313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6005.

The product of its (nonzero) digits is 540, while the sum is 24.

Adding to 11615313021 its reverse (12031351611), we get a palindrome (23646664632).

The spelling of 11615313021 in words is "eleven billion, six hundred fifteen million, three hundred thirteen thousand, twenty-one".