1161512201 has 4 divisors (see below), whose sum is σ = 1178848272. Its totient is φ = 1144176132.

The previous prime is 1161512179. The next prime is 1161512203. The reversal of 1161512201 is 1022151611.

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 1161512201 - 2²⁶ = 1094403337 is a prime.

It is a super-2 number, since 2×1161512201² = 2698221186143728802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161512203) 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, 8667935 + ... + 8668068.

It is an arithmetic number, because the mean of its divisors is an integer number (294712068).

Almost surely, 2^1161512201 is an apocalyptic number.

It is an amenable number.

1161512201 is a deficient number, since it is larger than the sum of its proper divisors (17336071).

1161512201 is an equidigital number, since it uses as much as digits as its factorization.

1161512201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17336070.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1161512201 is about 34080.9653765852. The cubic root of 1161512201 is about 1051.1739555982.

Adding to 1161512201 its reverse (1022151611), we get a palindrome (2183663812).

The spelling of 1161512201 in words is "one billion, one hundred sixty-one million, five hundred twelve thousand, two hundred one".