1312220201 has 2 divisors, whose sum is σ = 1312220202. Its totient is φ = 1312220200.

The previous prime is 1312220197. The next prime is 1312220249. The reversal of 1312220201 is 1020222131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1312178176 + 42025 = 36224^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312220201 - 2² = 1312220197 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312220291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656110100 + 656110101.

It is an arithmetic number, because the mean of its divisors is an integer number (656110101).

Almost surely, 2^1312220201 is an apocalyptic number.

It is an amenable number.

1312220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312220201 is an equidigital number, since it uses as much as digits as its factorization.

1312220201 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1312220201 is about 36224.5800665791. The cubic root of 1312220201 is about 1094.8019772156.

Adding to 1312220201 its reverse (1020222131), we get a palindrome (2332442332).

The spelling of 1312220201 in words is "one billion, three hundred twelve million, two hundred twenty thousand, two hundred one".