221212100202044 has 24 divisors (see below), whose sum is σ = 442429410705408. Its totient is φ = 94804069307760.

The previous prime is 221212100202013. The next prime is 221212100202061. The reversal of 221212100202044 is 440202001212122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44098304 + ... + 48857799.

It is an arithmetic number, because the mean of its divisors is an integer number (18434558779392).

Almost surely, 2^{221212100202044} is an apocalyptic number.

It is an amenable number.

221212100202044 is an abundant number, since it is smaller than the sum of its proper divisors (221217310503364).

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

221212100202044 is a wasteful number, since it uses less digits than its factorization.

221212100202044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93041105 (or 93041103 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221212100202044 its reverse (440202001212122), we get a palindrome (661414101414166).

The spelling of 221212100202044 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred million, two hundred two thousand, forty-four".