221220112233 has 4 divisors (see below), whose sum is σ = 294960149648. Its totient is φ = 147480074820.

The previous prime is 221220112229. The next prime is 221220112313. The reversal of 221220112233 is 332211022122.

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 221220112233 - 2² = 221220112229 is a prime.

It is a super-2 number, since 2×221220112233² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221220132233) 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, 36870018703 + ... + 36870018708.

It is an arithmetic number, because the mean of its divisors is an integer number (73740037412).

Almost surely, 2^221220112233 is an apocalyptic number.

It is an amenable number.

221220112233 is a deficient number, since it is larger than the sum of its proper divisors (73740037415).

221220112233 is an equidigital number, since it uses as much as digits as its factorization.

221220112233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73740037414.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221220112233 its reverse (332211022122), we get a palindrome (553431134355).

The spelling of 221220112233 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, two hundred thirty-three".