1201210221 has 8 divisors (see below), whose sum is σ = 1601818560. Its totient is φ = 800704352.

The previous prime is 1201210207. The next prime is 1201210261. The reversal of 1201210221 is 1220121021.

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 1201210221 - 2⁷ = 1201210093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201210197 and 1201210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201210201) 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, 8065 + ... + 49673.

It is an arithmetic number, because the mean of its divisors is an integer number (200227320).

Almost surely, 2^1201210221 is an apocalyptic number.

It is an amenable number.

1201210221 is a deficient number, since it is larger than the sum of its proper divisors (400608339).

1201210221 is an equidigital number, since it uses as much as digits as its factorization.

1201210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51235.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1201210221 is about 34658.4797848954. The cubic root of 1201210221 is about 1063.0156857446.

Adding to 1201210221 its reverse (1220121021), we get a palindrome (2421331242).

The spelling of 1201210221 in words is "one billion, two hundred one million, two hundred ten thousand, two hundred twenty-one".