131403432121105 has 4 divisors (see below), whose sum is σ = 157684118545332. Its totient is φ = 105122745696880.

The previous prime is 131403432121099. The next prime is 131403432121133. The reversal of 131403432121105 is 501121234304131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23954534669569 + 107448897451536 = 4894337^2 + 10365756^2 .

It is not a de Polignac number, because 131403432121105 - 2⁷ = 131403432120977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13140343212106 + ... + 13140343212115.

It is an arithmetic number, because the mean of its divisors is an integer number (39421029636333).

Almost surely, 2^{131403432121105} is an apocalyptic number.

It is an amenable number.

131403432121105 is a deficient number, since it is larger than the sum of its proper divisors (26280686424227).

131403432121105 is an equidigital number, since it uses as much as digits as its factorization.

131403432121105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26280686424226.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 131403432121105 its reverse (501121234304131), we get a palindrome (632524666425236).

The spelling of 131403432121105 in words is "one hundred thirty-one trillion, four hundred three billion, four hundred thirty-two million, one hundred twenty-one thousand, one hundred five".