1200401221 has 8 divisors (see below), whose sum is σ = 1215549504. Its totient is φ = 1185325920.

The previous prime is 1200401207. The next prime is 1200401311. The reversal of 1200401221 is 1221040021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200401221 - 2⁹ = 1200400709 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 (1200401021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15241 + ... + 51313.

It is an arithmetic number, because the mean of its divisors is an integer number (151943688).

Almost surely, 2^1200401221 is an apocalyptic number.

It is an amenable number.

1200401221 is a deficient number, since it is larger than the sum of its proper divisors (15148283).

1200401221 is a wasteful number, since it uses less digits than its factorization.

1200401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36491.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1200401221 is about 34646.8067937003. The cubic root of 1200401221 is about 1062.7769895783.

Adding to 1200401221 its reverse (1221040021), we get a palindrome (2421441242).

The spelling of 1200401221 in words is "one billion, two hundred million, four hundred one thousand, two hundred twenty-one".