11013001221 has 4 divisors (see below), whose sum is σ = 14684001632. Its totient is φ = 7342000812.

The previous prime is 11013001211. The next prime is 11013001229. The reversal of 11013001221 is 12210031011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12210031011 = 3 ⋅4070010337.

It is not a de Polignac number, because 11013001221 - 2⁷ = 11013001093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11013001197 and 11013001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11013001229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1835500201 + ... + 1835500206.

It is an arithmetic number, because the mean of its divisors is an integer number (3671000408).

Almost surely, 2^11013001221 is an apocalyptic number.

It is an amenable number.

11013001221 is a deficient number, since it is larger than the sum of its proper divisors (3671000411).

11013001221 is an equidigital number, since it uses as much as digits as its factorization.

11013001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671000410.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 11013001221 its reverse (12210031011), we get a palindrome (23223032232).

The spelling of 11013001221 in words is "eleven billion, thirteen million, one thousand, two hundred twenty-one".