221100202200212 has 48 divisors (see below), whose sum is σ = 396802848565200. Its totient is φ = 107760798351360.

The previous prime is 221100202200209. The next prime is 221100202200217. The reversal of 221100202200212 is 212002202001122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 15926835832336 + 205173366367876 = 3990844^2 + 14323874^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100202200217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202633964 + ... + 203722172.

It is an arithmetic number, because the mean of its divisors is an integer number (8266726011775).

Almost surely, 2^{221100202200212} is an apocalyptic number.

It is an amenable number.

221100202200212 is a deficient number, since it is larger than the sum of its proper divisors (175702646364988).

221100202200212 is a wasteful number, since it uses less digits than its factorization.

221100202200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095756 (or 1095754 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221100202200212 its reverse (212002202001122), we get a palindrome (433102404201334).

The spelling of 221100202200212 in words is "two hundred twenty-one trillion, one hundred billion, two hundred two million, two hundred thousand, two hundred twelve".