1201164611 has 4 divisors (see below), whose sum is σ = 1202563800. Its totient is φ = 1199765424.

The previous prime is 1201164583. The next prime is 1201164617. The reversal of 1201164611 is 1164611021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201164611 - 2³⁰ = 127422787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201164617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698306 + ... + 700023.

It is an arithmetic number, because the mean of its divisors is an integer number (300640950).

Almost surely, 2^1201164611 is an apocalyptic number.

1201164611 is a deficient number, since it is larger than the sum of its proper divisors (1399189).

1201164611 is an equidigital number, since it uses as much as digits as its factorization.

1201164611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399188.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1201164611 is about 34657.8217867194. The cubic root of 1201164611 is about 1063.0022313250.

Adding to 1201164611 its reverse (1164611021), we get a palindrome (2365775632).

The spelling of 1201164611 in words is "one billion, two hundred one million, one hundred sixty-four thousand, six hundred eleven".