220311221212 has 6 divisors (see below), whose sum is σ = 385544637128. Its totient is φ = 110155610604.

The previous prime is 220311221209. The next prime is 220311221219. The reversal of 220311221212 is 212122113022.

It is a super-3 number, since 3×220311221212³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220311221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220311221219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27538902648 + ... + 27538902655.

Almost surely, 2^220311221212 is an apocalyptic number.

It is an amenable number.

220311221212 is a deficient number, since it is larger than the sum of its proper divisors (165233415916).

220311221212 is a wasteful number, since it uses less digits than its factorization.

220311221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55077805307 (or 55077805305 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 220311221212 its reverse (212122113022), we get a palindrome (432433334234).

The spelling of 220311221212 in words is "two hundred twenty billion, three hundred eleven million, two hundred twenty-one thousand, two hundred twelve".