1243210201 has 4 divisors (see below), whose sum is σ = 1243413504. Its totient is φ = 1243006900.

The previous prime is 1243210183. The next prime is 1243210217. The reversal of 1243210201 is 1020123421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1243210201 - 2¹⁵ = 1243177433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243210231) 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, 92185 + ... + 104806.

It is an arithmetic number, because the mean of its divisors is an integer number (310853376).

Almost surely, 2^1243210201 is an apocalyptic number.

It is an amenable number.

1243210201 is a deficient number, since it is larger than the sum of its proper divisors (203303).

1243210201 is an equidigital number, since it uses as much as digits as its factorization.

1243210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203302.

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

The square root of 1243210201 is about 35259.1860512973. The cubic root of 1243210201 is about 1075.2633790570.

Adding to 1243210201 its reverse (1020123421), we get a palindrome (2263333622).

The spelling of 1243210201 in words is "one billion, two hundred forty-three million, two hundred ten thousand, two hundred one".