1211120201 has 4 divisors (see below), whose sum is σ = 1228178304. Its totient is φ = 1194062100.

The previous prime is 1211120179. The next prime is 1211120203. The reversal of 1211120201 is 1020211121.

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 a de Polignac number, because none of the positive numbers 2^k-1211120201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211120203) 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, 8528945 + ... + 8529086.

It is an arithmetic number, because the mean of its divisors is an integer number (307044576).

Almost surely, 2^1211120201 is an apocalyptic number.

It is an amenable number.

1211120201 is a deficient number, since it is larger than the sum of its proper divisors (17058103).

1211120201 is an equidigital number, since it uses as much as digits as its factorization.

1211120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17058102.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1211120201 is about 34801.1522941411. The cubic root of 1211120201 is about 1065.9309752002.

Adding to 1211120201 its reverse (1020211121), we get a palindrome (2231331322).

The spelling of 1211120201 in words is "one billion, two hundred eleven million, one hundred twenty thousand, two hundred one".