131121145 has 8 divisors (see below), whose sum is σ = 157973760. Its totient is φ = 104478000.

The previous prime is 131121131. The next prime is 131121149. The reversal of 131121145 is 541121131.

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

It is not a de Polignac number, because 131121145 - 2⁵ = 131121113 is a prime.

It is a super-2 number, since 2×131121145² = 34385509332222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131121149) 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 7 ways as a sum of consecutive naturals, for example, 50985 + ... + 53494.

It is an arithmetic number, because the mean of its divisors is an integer number (19746720).

Almost surely, 2^131121145 is an apocalyptic number.

It is an amenable number.

131121145 is a deficient number, since it is larger than the sum of its proper divisors (26852615).

131121145 is a wasteful number, since it uses less digits than its factorization.

131121145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104735.

The product of its digits is 120, while the sum is 19.

The square root of 131121145 is about 11450.8141631938. The cubic root of 131121145 is about 508.0318156960.

Adding to 131121145 its reverse (541121131), we get a palindrome (672242276).

The spelling of 131121145 in words is "one hundred thirty-one million, one hundred twenty-one thousand, one hundred forty-five".