221020203312200 has 96 divisors (see below), whose sum is σ = 514871956085760. Its totient is φ = 88236079276800.

The previous prime is 221020203312197. The next prime is 221020203312211. The reversal of 221020203312200 is 2213302020122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 965997014 + ... + 966225786.

It is an arithmetic number, because the mean of its divisors is an integer number (5363249542560).

Almost surely, 2^{221020203312200} is an apocalyptic number.

221020203312200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020203312200 is an abundant number, since it is smaller than the sum of its proper divisors (293851752773560).

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

221020203312200 is a wasteful number, since it uses less digits than its factorization.

221020203312200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238167 (or 238158 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221020203312200 its reverse (2213302020122), we get a palindrome (223233505332322).

The spelling of 221020203312200 in words is "two hundred twenty-one trillion, twenty billion, two hundred three million, three hundred twelve thousand, two hundred".