11155001321 has 4 divisors (see below), whose sum is σ = 11344069200. Its totient is φ = 10965933444.

The previous prime is 11155001309. The next prime is 11155001329. The reversal of 11155001321 is 12310055111.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-11155001321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11155001293 and 11155001302.

It is not an unprimeable number, because it can be changed into a prime (11155001329) 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, 94533851 + ... + 94533968.

It is an arithmetic number, because the mean of its divisors is an integer number (2836017300).

Almost surely, 2^11155001321 is an apocalyptic number.

It is an amenable number.

11155001321 is a deficient number, since it is larger than the sum of its proper divisors (189067879).

11155001321 is an equidigital number, since it uses as much as digits as its factorization.

11155001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189067878.

The product of its (nonzero) digits is 150, while the sum is 20.

Adding to 11155001321 its reverse (12310055111), we get a palindrome (23465056432).

The spelling of 11155001321 in words is "eleven billion, one hundred fifty-five million, one thousand, three hundred twenty-one".