1207111161 has 4 divisors (see below), whose sum is σ = 1609481552. Its totient is φ = 804740772.

The previous prime is 1207111153. The next prime is 1207111177. The reversal of 1207111161 is 1611117021.

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 not a de Polignac number, because 1207111161 - 2³ = 1207111153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1207111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201185191 + ... + 201185196.

It is an arithmetic number, because the mean of its divisors is an integer number (402370388).

Almost surely, 2^1207111161 is an apocalyptic number.

It is an amenable number.

1207111161 is a deficient number, since it is larger than the sum of its proper divisors (402370391).

1207111161 is an equidigital number, since it uses as much as digits as its factorization.

1207111161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402370390.

The product of its (nonzero) digits is 84, while the sum is 21.

The square root of 1207111161 is about 34743.5053067476. The cubic root of 1207111161 is about 1064.7535297748.

Adding to 1207111161 its reverse (1611117021), we get a palindrome (2818228182).

It can be divided in two parts, 12071 and 11161, that added together give a palindrome (23232).

The spelling of 1207111161 in words is "one billion, two hundred seven million, one hundred eleven thousand, one hundred sixty-one".