1212223201 has 12 divisors (see below), whose sum is σ = 1440142848. Its totient is φ = 1016939112.

The previous prime is 1212223169. The next prime is 1212223213. The reversal of 1212223201 is 1023222121.

It is a happy number.

It is not a de Polignac number, because 1212223201 - 2⁵ = 1212223169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212223801) 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 11 ways as a sum of consecutive naturals, for example, 260881 + ... + 265486.

It is an arithmetic number, because the mean of its divisors is an integer number (120011904).

Almost surely, 2^1212223201 is an apocalyptic number.

It is an amenable number.

1212223201 is a deficient number, since it is larger than the sum of its proper divisors (227919647).

1212223201 is an equidigital number, since it uses as much as digits as its factorization.

1212223201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526428 (or 526421 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1212223201 is about 34816.9958640891. The cubic root of 1212223201 is about 1066.2544677609.

Adding to 1212223201 its reverse (1023222121), we get a palindrome (2235445322).

The spelling of 1212223201 in words is "one billion, two hundred twelve million, two hundred twenty-three thousand, two hundred one".