221212120333 has 4 divisors (see below), whose sum is σ = 221845966300. Its totient is φ = 220578274368.

The previous prime is 221212120309. The next prime is 221212120361. The reversal of 221212120333 is 333021212122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 204813268969 + 16398851364 = 452563^2 + 128058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221212120333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212120433) 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, 316922460 + ... + 316923157.

It is an arithmetic number, because the mean of its divisors is an integer number (55461491575).

Almost surely, 2^221212120333 is an apocalyptic number.

It is an amenable number.

221212120333 is a deficient number, since it is larger than the sum of its proper divisors (633845967).

221212120333 is an equidigital number, since it uses as much as digits as its factorization.

221212120333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633845966.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221212120333 its reverse (333021212122), we get a palindrome (554233332455).

The spelling of 221212120333 in words is "two hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, three hundred thirty-three".