11513310621 has 4 divisors (see below), whose sum is σ = 15351080832. Its totient is φ = 7675540412.

The previous prime is 11513310539. The next prime is 11513310637. The reversal of 11513310621 is 12601331511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12601331511 = 3 ⋅4200443837.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11513310621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11513310591 and 11513310600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11513310671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1918885101 + ... + 1918885106.

It is an arithmetic number, because the mean of its divisors is an integer number (3837770208).

Almost surely, 2^11513310621 is an apocalyptic number.

It is an amenable number.

11513310621 is a deficient number, since it is larger than the sum of its proper divisors (3837770211).

11513310621 is an equidigital number, since it uses as much as digits as its factorization.

11513310621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837770210.

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

The spelling of 11513310621 in words is "eleven billion, five hundred thirteen million, three hundred ten thousand, six hundred twenty-one".