131211105 has 8 divisors (see below), whose sum is σ = 209937792. Its totient is φ = 69979248.

The previous prime is 131211097. The next prime is 131211133. The reversal of 131211105 is 501112131.

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

It is not a de Polignac number, because 131211105 - 2³ = 131211097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 8747407 = 131211105 / (1 + 3 + 1 + 2 + 1 + 1 + 1 + 0 + 5).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4373689 + ... + 4373718.

It is an arithmetic number, because the mean of its divisors is an integer number (26242224).

Almost surely, 2^131211105 is an apocalyptic number.

131211105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131211105 is a deficient number, since it is larger than the sum of its proper divisors (78726687).

131211105 is an equidigital number, since it uses as much as digits as its factorization.

131211105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747415.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 131211105 is about 11454.7415946411. The cubic root of 131211105 is about 508.1479731477.

Adding to 131211105 its reverse (501112131), we get a palindrome (632323236).

The spelling of 131211105 in words is "one hundred thirty-one million, two hundred eleven thousand, one hundred five".