1201222201 has 4 divisors (see below), whose sum is σ = 1201334004. Its totient is φ = 1201110400.

The previous prime is 1201222181. The next prime is 1201222207. The reversal of 1201222201 is 1022221021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1022221021 = 241 ⋅4241581.

It can be written as a sum of positive squares in 2 ways, for example, as 405982201 + 795240000 = 20149^2 + 28200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201222201 - 2⁷ = 1201222073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201222207) 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, 37840 + ... + 61921.

It is an arithmetic number, because the mean of its divisors is an integer number (300333501).

Almost surely, 2^1201222201 is an apocalyptic number.

It is an amenable number.

1201222201 is a deficient number, since it is larger than the sum of its proper divisors (111803).

1201222201 is an equidigital number, since it uses as much as digits as its factorization.

1201222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111802.

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

The square root of 1201222201 is about 34658.6526137413. The cubic root of 1201222201 is about 1063.0192196488.

Adding to 1201222201 its reverse (1022221021), we get a palindrome (2223443222).

The spelling of 1201222201 in words is "one billion, two hundred one million, two hundred twenty-two thousand, two hundred one".