1200023221 has 4 divisors (see below), whose sum is σ = 1200707200. Its totient is φ = 1199339244.

The previous prime is 1200023179. The next prime is 1200023239. The reversal of 1200023221 is 1223200021.

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 1200023221 - 2⁷ = 1200023093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200023291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339351 + ... + 342868.

It is an arithmetic number, because the mean of its divisors is an integer number (300176800).

Almost surely, 2^1200023221 is an apocalyptic number.

It is an amenable number.

1200023221 is a deficient number, since it is larger than the sum of its proper divisors (683979).

1200023221 is an equidigital number, since it uses as much as digits as its factorization.

1200023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683978.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1200023221 is about 34641.3513160211. The cubic root of 1200023221 is about 1062.6654235814.

Adding to 1200023221 its reverse (1223200021), we get a palindrome (2423223242).

The spelling of 1200023221 in words is "one billion, two hundred million, twenty-three thousand, two hundred twenty-one".