221212030044 has 48 divisors (see below), whose sum is σ = 535022046720. Its totient is φ = 71053080000.

The previous prime is 221212030021. The next prime is 221212030049. The reversal of 221212030044 is 440030212122.

It is a self number, because there is not a number n which added to its sum of digits gives 221212030044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212030049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456832 + ... + 806919.

It is an arithmetic number, because the mean of its divisors is an integer number (11146292640).

Almost surely, 2^221212030044 is an apocalyptic number.

It is an amenable number.

221212030044 is an abundant number, since it is smaller than the sum of its proper divisors (313810016676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221212030044 is a wasteful number, since it uses less digits than its factorization.

221212030044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264290 (or 1264288 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 221212030044 its reverse (440030212122), we get a palindrome (661242242166).

The spelling of 221212030044 in words is "two hundred twenty-one billion, two hundred twelve million, thirty thousand, forty-four".