11221615501 has 4 divisors (see below), whose sum is σ = 11225838400. Its totient is φ = 11217392604.

The previous prime is 11221615451. The next prime is 11221615513. The reversal of 11221615501 is 10551612211.

11221615501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11221615501 - 2¹⁷ = 11221484429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221616501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2107461 + ... + 2112778.

It is an arithmetic number, because the mean of its divisors is an integer number (2806459600).

Almost surely, 2^11221615501 is an apocalyptic number.

It is an amenable number.

11221615501 is a deficient number, since it is larger than the sum of its proper divisors (4222899).

11221615501 is an equidigital number, since it uses as much as digits as its factorization.

11221615501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4222898.

The product of its (nonzero) digits is 600, while the sum is 25.

The spelling of 11221615501 in words is "eleven billion, two hundred twenty-one million, six hundred fifteen thousand, five hundred one".