131121163 has 4 divisors (see below), whose sum is σ = 132394288. Its totient is φ = 129848040.

The previous prime is 131121161. The next prime is 131121181. The reversal of 131121163 is 361121131.

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 131121163 - 2¹ = 131121161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131121163.

It is not an unprimeable number, because it can be changed into a prime (131121161) 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, 636408 + ... + 636613.

It is an arithmetic number, because the mean of its divisors is an integer number (33098572).

Almost surely, 2^131121163 is an apocalyptic number.

131121163 is a deficient number, since it is larger than the sum of its proper divisors (1273125).

131121163 is a wasteful number, since it uses less digits than its factorization.

131121163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273124.

The product of its digits is 108, while the sum is 19.

The square root of 131121163 is about 11450.8149491641. The cubic root of 131121163 is about 508.0318389431.

Adding to 131121163 its reverse (361121131), we get a palindrome (492242294).

The spelling of 131121163 in words is "one hundred thirty-one million, one hundred twenty-one thousand, one hundred sixty-three".