11415320221 has 4 divisors (see below), whose sum is σ = 11424163744. Its totient is φ = 11406476700.

The previous prime is 11415320201. The next prime is 11415320239. The reversal of 11415320221 is 12202351411.

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 11415320221 - 2⁷ = 11415320093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11415320192 and 11415320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11415320201) 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, 4419825 + ... + 4422406.

It is an arithmetic number, because the mean of its divisors is an integer number (2856040936).

Almost surely, 2^11415320221 is an apocalyptic number.

It is an amenable number.

11415320221 is a deficient number, since it is larger than the sum of its proper divisors (8843523).

11415320221 is an equidigital number, since it uses as much as digits as its factorization.

11415320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8843522.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 11415320221 its reverse (12202351411), we get a palindrome (23617671632).

The spelling of 11415320221 in words is "eleven billion, four hundred fifteen million, three hundred twenty thousand, two hundred twenty-one".