221212033233 has 4 divisors (see below), whose sum is σ = 294949377648. Its totient is φ = 147474688820.

The previous prime is 221212033219. The next prime is 221212033249. The reversal of 221212033233 is 332330212122.

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-221212033233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212033213) 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, 36868672203 + ... + 36868672208.

It is an arithmetic number, because the mean of its divisors is an integer number (73737344412).

Almost surely, 2^221212033233 is an apocalyptic number.

It is an amenable number.

221212033233 is a deficient number, since it is larger than the sum of its proper divisors (73737344415).

221212033233 is an equidigital number, since it uses as much as digits as its factorization.

221212033233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73737344414.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 221212033233 its reverse (332330212122), we get a palindrome (553542245355).

The spelling of 221212033233 in words is "two hundred twenty-one billion, two hundred twelve million, thirty-three thousand, two hundred thirty-three".