11551060221 has 4 divisors (see below), whose sum is σ = 15401413632. Its totient is φ = 7700706812.

The previous prime is 11551060217. The next prime is 11551060237. The reversal of 11551060221 is 12206015511.

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 11551060221 - 2² = 11551060217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11551060191 and 11551060200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551060211) 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, 1925176701 + ... + 1925176706.

It is an arithmetic number, because the mean of its divisors is an integer number (3850353408).

Almost surely, 2^11551060221 is an apocalyptic number.

It is an amenable number.

11551060221 is a deficient number, since it is larger than the sum of its proper divisors (3850353411).

11551060221 is an equidigital number, since it uses as much as digits as its factorization.

11551060221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850353410.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 11551060221 its reverse (12206015511), we get a palindrome (23757075732).

The spelling of 11551060221 in words is "eleven billion, five hundred fifty-one million, sixty thousand, two hundred twenty-one".