221001200 has 60 divisors (see below), whose sum is σ = 606813840. Its totient is φ = 75770880.

The previous prime is 221001167. The next prime is 221001223. The reversal of 221001200 is 2100122.

221001200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36665 + ... + 42264.

It is an arithmetic number, because the mean of its divisors is an integer number (10113564).

Almost surely, 2^221001200 is an apocalyptic number.

221001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001200 is an abundant number, since it is smaller than the sum of its proper divisors (385812640).

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

221001200 is a wasteful number, since it uses less digits than its factorization.

221001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78954 (or 78943 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 221001200 is about 14866.1091076314. The cubic root of 221001200 is about 604.5954538877.

Adding to 221001200 its reverse (2100122), we get a palindrome (223101322).

The spelling of 221001200 in words is "two hundred twenty-one million, one thousand, two hundred".