131201213123 has 4 divisors (see below), whose sum is σ = 138918931560. Its totient is φ = 123483494688.

The previous prime is 131201213093. The next prime is 131201213167. The reversal of 131201213123 is 321312102131.

It is a happy number.

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 131201213123 - 2¹⁰ = 131201212099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131201213095 and 131201213104.

It is not an unprimeable number, because it can be changed into a prime (131201213173) 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, 3858859193 + ... + 3858859226.

It is an arithmetic number, because the mean of its divisors is an integer number (34729732890).

Almost surely, 2^131201213123 is an apocalyptic number.

131201213123 is a deficient number, since it is larger than the sum of its proper divisors (7717718437).

131201213123 is an equidigital number, since it uses as much as digits as its factorization.

131201213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7717718436.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 131201213123 its reverse (321312102131), we get a palindrome (452513315254).

The spelling of 131201213123 in words is "one hundred thirty-one billion, two hundred one million, two hundred thirteen thousand, one hundred twenty-three".