221012220200 has 48 divisors (see below), whose sum is σ = 513926896380. Its totient is φ = 88392245760.

The previous prime is 221012220181. The next prime is 221012220203. The reversal of 221012220200 is 2022210122.

It can be written as a sum of positive squares in 6 ways, for example, as 44741556484 + 176270663716 = 211522^2 + 419846^2 .

It is not an unprimeable number, because it can be changed into a prime (221012220203) 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, 1391252 + ... + 1541948.

Almost surely, 2^221012220200 is an apocalyptic number.

221012220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012220200 is an abundant number, since it is smaller than the sum of its proper divisors (292914676180).

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

221012220200 is a wasteful number, since it uses less digits than its factorization.

221012220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158046 (or 158037 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221012220200 its reverse (2022210122), we get a palindrome (223034430322).

It can be divided in two parts, 2210122 and 20200, that added together give a palindrome (2230322).

The spelling of 221012220200 in words is "two hundred twenty-one billion, twelve million, two hundred twenty thousand, two hundred".