11511413015321 has 4 divisors (see below), whose sum is σ = 11511684610944. Its totient is φ = 11511141419700.

The previous prime is 11511413015287. The next prime is 11511413015383. The reversal of 11511413015321 is 12351031411511.

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.

It is a cyclic number.

It is not a de Polignac number, because 11511413015321 - 2⁶ = 11511413015257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11511413015021) 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, 135734225 + ... + 135819006.

It is an arithmetic number, because the mean of its divisors is an integer number (2877921152736).

Almost surely, 2^{11511413015321} is an apocalyptic number.

It is an amenable number.

11511413015321 is a deficient number, since it is larger than the sum of its proper divisors (271595623).

11511413015321 is an equidigital number, since it uses as much as digits as its factorization.

11511413015321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271595622.

The product of its (nonzero) digits is 1800, while the sum is 29.

Adding to 11511413015321 its reverse (12351031411511), we get a palindrome (23862444426832).

The spelling of 11511413015321 in words is "eleven trillion, five hundred eleven billion, four hundred thirteen million, fifteen thousand, three hundred twenty-one".