221055115233 has 4 divisors (see below), whose sum is σ = 294740153648. Its totient is φ = 147370076820.

The previous prime is 221055115189. The next prime is 221055115247. The reversal of 221055115233 is 332511550122.

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 not a de Polignac number, because 221055115233 - 2¹⁶ = 221055049697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221055115233.

It is not an unprimeable number, because it can be changed into a prime (221055615233) 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, 36842519203 + ... + 36842519208.

It is an arithmetic number, because the mean of its divisors is an integer number (73685038412).

Almost surely, 2^221055115233 is an apocalyptic number.

It is an amenable number.

221055115233 is a deficient number, since it is larger than the sum of its proper divisors (73685038415).

221055115233 is an equidigital number, since it uses as much as digits as its factorization.

221055115233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73685038414.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 221055115233 its reverse (332511550122), we get a palindrome (553566665355).

The spelling of 221055115233 in words is "two hundred twenty-one billion, fifty-five million, one hundred fifteen thousand, two hundred thirty-three".