131121310552123 has 4 divisors (see below), whose sum is σ = 131130315532728. Its totient is φ = 131112305571520.

The previous prime is 131121310552109. The next prime is 131121310552129. The reversal of 131121310552123 is 321255013121131.

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

It is a cyclic number.

It is not a de Polignac number, because 131121310552123 - 2⁹ = 131121310551611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121310552129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4502468461 + ... + 4502497582.

It is an arithmetic number, because the mean of its divisors is an integer number (32782578883182).

Almost surely, 2^{131121310552123} is an apocalyptic number.

131121310552123 is a deficient number, since it is larger than the sum of its proper divisors (9004980605).

131121310552123 is an equidigital number, since it uses as much as digits as its factorization.

131121310552123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9004980604.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 131121310552123 its reverse (321255013121131), we get a palindrome (452376323673254).

The spelling of 131121310552123 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, three hundred ten million, five hundred fifty-two thousand, one hundred twenty-three".