221001221113 has 4 divisors (see below), whose sum is σ = 221058672640. Its totient is φ = 220943769588.

The previous prime is 221001221099. The next prime is 221001221159. The reversal of 221001221113 is 311122100122.

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 a de Polignac number, because none of the positive numbers 2^k-221001221113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221001221813) 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, 28719993 + ... + 28727686.

It is an arithmetic number, because the mean of its divisors is an integer number (55264668160).

Almost surely, 2^221001221113 is an apocalyptic number.

It is an amenable number.

221001221113 is a deficient number, since it is larger than the sum of its proper divisors (57451527).

221001221113 is an equidigital number, since it uses as much as digits as its factorization.

221001221113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57451526.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221001221113 its reverse (311122100122), we get a palindrome (532123321235).

The spelling of 221001221113 in words is "two hundred twenty-one billion, one million, two hundred twenty-one thousand, one hundred thirteen".