1222120201 has 4 divisors (see below), whose sum is σ = 1230322500. Its totient is φ = 1213917904.

The previous prime is 1222120189. The next prime is 1222120213. The reversal of 1222120201 is 1020212221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1222120189) and next prime (1222120213).

It can be written as a sum of positive squares in 2 ways, for example, as 78057225 + 1144062976 = 8835^2 + 33824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222120201 - 2⁷ = 1222120073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222120901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4100926 + ... + 4101223.

It is an arithmetic number, because the mean of its divisors is an integer number (307580625).

Almost surely, 2^1222120201 is an apocalyptic number.

It is an amenable number.

1222120201 is a deficient number, since it is larger than the sum of its proper divisors (8202299).

1222120201 is an equidigital number, since it uses as much as digits as its factorization.

1222120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8202298.

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

The square root of 1222120201 is about 34958.8358072748. The cubic root of 1222120201 is about 1069.1483603915.

Adding to 1222120201 its reverse (1020212221), we get a palindrome (2242332422).

The spelling of 1222120201 in words is "one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred one".