1200221 has 4 divisors (see below), whose sum is σ = 1309344. Its totient is φ = 1091100.

The previous prime is 1200191. The next prime is 1200233. The reversal of 1200221 is 1220021.

1200221 = 101² + 102² + ... + 166².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200221 - 2¹⁴ = 1183837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200199 and 1200208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54545 + ... + 54566.

It is an arithmetic number, because the mean of its divisors is an integer number (327336).

2^1200221 is an apocalyptic number.

1200221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200221 is a deficient number, since it is larger than the sum of its proper divisors (109123).

1200221 is a wasteful number, since it uses less digits than its factorization.

1200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109122.

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

The square root of 1200221 is about 1095.5459826041. The cubic root of 1200221 is about 106.2723800607.

Adding to 1200221 its reverse (1220021), we get a palindrome (2420242).

The spelling of 1200221 in words is "one million, two hundred thousand, two hundred twenty-one".