131122191 has 8 divisors (see below), whose sum is σ = 179554864. Its totient is φ = 85052160.

The previous prime is 131122181. The next prime is 131122247. The reversal of 131122191 is 191221131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131122191 - 2¹⁸ = 130860047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122111) 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 7 ways as a sum of consecutive naturals, for example, 590530 + ... + 590751.

It is an arithmetic number, because the mean of its divisors is an integer number (22444358).

Almost surely, 2^131122191 is an apocalyptic number.

131122191 is a deficient number, since it is larger than the sum of its proper divisors (48432673).

131122191 is a wasteful number, since it uses less digits than its factorization.

131122191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181321.

The product of its digits is 108, while the sum is 21.

The square root of 131122191 is about 11450.8598367110. The cubic root of 131122191 is about 508.0331666092.

The spelling of 131122191 in words is "one hundred thirty-one million, one hundred twenty-two thousand, one hundred ninety-one".