Adding to 131403432121105 its reverse (501121234304131), we get a palindrome (632524666425236).
It is a happy number.
It is a semiprime because it is the product of two primes.
It is a Duffinian number.
It is an unprimeable number.
Almost surely, 2131403432121105 is an apocalyptic number.
It is an amenable number.
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 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".