131121091 has 8 divisors (see below), whose sum is σ = 137337120. Its totient is φ = 124948032.

The previous prime is 131121031. The next prime is 131121113. The reversal of 131121091 is 190121131.

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

It is a cyclic number.

It is not a de Polignac number, because 131121091 - 2⁷ = 131120963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4410 + ... + 16783.

It is an arithmetic number, because the mean of its divisors is an integer number (17167140).

Almost surely, 2^131121091 is an apocalyptic number.

131121091 is a deficient number, since it is larger than the sum of its proper divisors (6216029).

131121091 is a wasteful number, since it uses less digits than its factorization.

131121091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21485.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 131121091 is about 11450.8118052826. The cubic root of 131121091 is about 508.0317459546.

The spelling of 131121091 in words is "one hundred thirty-one million, one hundred twenty-one thousand, ninety-one".