221220020200 has 24 divisors (see below), whose sum is σ = 514336547430. Its totient is φ = 88488008000.

The previous prime is 221220020167. The next prime is 221220020233. The reversal of 221220020200 is 2020022122.

It is an interprime number because it is at equal distance from previous prime (221220020167) and next prime (221220020233).

It can be written as a sum of positive squares in 3 ways, for example, as 129886718404 + 91333301796 = 360398^2 + 302214^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553049851 + ... + 553050250.

Almost surely, 2^221220020200 is an apocalyptic number.

221220020200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220020200 is an abundant number, since it is smaller than the sum of its proper divisors (293116527230).

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

221220020200 is a wasteful number, since it uses less digits than its factorization.

221220020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106100117 (or 1106100108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 221220020200 its reverse (2020022122), we get a palindrome (223240042322).

The spelling of 221220020200 in words is "two hundred twenty-one billion, two hundred twenty million, twenty thousand, two hundred".