11221001012221 has 32 divisors (see below), whose sum is σ = 15721001146368. Its totient is φ = 7720134459840.

The previous prime is 11221001012203. The next prime is 11221001012227. The reversal of 11221001012221 is 12221010012211.

It is not a de Polignac number, because 11221001012221 - 2⁷ = 11221001012093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221001012195 and 11221001012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221001012227) 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, 243668091 + ... + 243714136.

It is an arithmetic number, because the mean of its divisors is an integer number (491281285824).

Almost surely, 2^{11221001012221} is an apocalyptic number.

11221001012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221001012221 is a deficient number, since it is larger than the sum of its proper divisors (4500000134147).

11221001012221 is a wasteful number, since it uses less digits than its factorization.

11221001012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487382281.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11221001012221 its reverse (12221010012211), we get a palindrome (23442011024432).

The spelling of 11221001012221 in words is "eleven trillion, two hundred twenty-one billion, one million, twelve thousand, two hundred twenty-one".