1212320201 has 4 divisors (see below), whose sum is σ = 1283633172. Its totient is φ = 1141007232.

The previous prime is 1212320183. The next prime is 1212320227. The reversal of 1212320201 is 1020232121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1020232121 = 11909 ⋅85669.

It can be written as a sum of positive squares in 2 ways, for example, as 906070201 + 306250000 = 30101^2 + 17500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212320201 - 2¹⁰ = 1212319177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212320231) 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, 35656460 + ... + 35656493.

It is an arithmetic number, because the mean of its divisors is an integer number (320908293).

Almost surely, 2^1212320201 is an apocalyptic number.

It is an amenable number.

1212320201 is a deficient number, since it is larger than the sum of its proper divisors (71312971).

1212320201 is an equidigital number, since it uses as much as digits as its factorization.

1212320201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71312970.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1212320201 is about 34818.3888340630. The cubic root of 1212320201 is about 1066.2829069473.

Adding to 1212320201 its reverse (1020232121), we get a palindrome (2232552322).

The spelling of 1212320201 in words is "one billion, two hundred twelve million, three hundred twenty thousand, two hundred one".