131121097 has 4 divisors (see below), whose sum is σ = 131742736. Its totient is φ = 130499460.

The previous prime is 131121031. The next prime is 131121113. The reversal of 131121097 is 790121131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 790121131 = 10169 ⋅77699.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131121097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121997) 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 3 ways as a sum of consecutive naturals, for example, 310503 + ... + 310924.

It is an arithmetic number, because the mean of its divisors is an integer number (32935684).

Almost surely, 2^131121097 is an apocalyptic number.

It is an amenable number.

131121097 is a deficient number, since it is larger than the sum of its proper divisors (621639).

131121097 is an equidigital number, since it uses as much as digits as its factorization.

131121097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621638.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 131121097 is about 11450.8120672728. The cubic root of 131121097 is about 508.0317537036.

The spelling of 131121097 in words is "one hundred thirty-one million, one hundred twenty-one thousand, ninety-seven".