11511252213321 has 32 divisors (see below), whose sum is σ = 17617440522240. Its totient is φ = 6549180476544.

The previous prime is 11511252213317. The next prime is 11511252213323. The reversal of 11511252213321 is 12331225211511.

It is not a de Polignac number, because 11511252213321 - 2² = 11511252213317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11511252213323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79776786 + ... + 79920948.

It is an arithmetic number, because the mean of its divisors is an integer number (550545016320).

Almost surely, 2^{11511252213321} is an apocalyptic number.

It is an amenable number.

11511252213321 is a deficient number, since it is larger than the sum of its proper divisors (6106188308919).

11511252213321 is a wasteful number, since it uses less digits than its factorization.

11511252213321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160725.

The product of its digits is 3600, while the sum is 30.

Adding to 11511252213321 its reverse (12331225211511), we get a palindrome (23842477424832).

The spelling of 11511252213321 in words is "eleven trillion, five hundred eleven billion, two hundred fifty-two million, two hundred thirteen thousand, three hundred twenty-one".