221211210200 has 48 divisors (see below), whose sum is σ = 517592035680. Its totient is φ = 87920876160.

The previous prime is 221211210167. The next prime is 221211210203. The reversal of 221211210200 is 2012112122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211210203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3491072 + ... + 3553871.

It is an arithmetic number, because the mean of its divisors is an integer number (10783167410).

Almost surely, 2^221211210200 is an apocalyptic number.

221211210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221211210200 is an abundant number, since it is smaller than the sum of its proper divisors (296380825480).

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

221211210200 is a wasteful number, since it uses less digits than its factorization.

221211210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045116 (or 7045107 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221211210200 its reverse (2012112122), we get a palindrome (223223322322).

It can be divided in two parts, 22121 and 1210200, that added together give a palindrome (1232321).

The spelling of 221211210200 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, two hundred".