131202123 has 16 divisors (see below), whose sum is σ = 189557760. Its totient is φ = 80240544.

The previous prime is 131202089. The next prime is 131202139. The reversal of 131202123 is 321202131.

It is not a de Polignac number, because 131202123 - 2⁶ = 131202059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131202523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3963 + ... + 16676.

It is an arithmetic number, because the mean of its divisors is an integer number (11847360).

Almost surely, 2^131202123 is an apocalyptic number.

131202123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131202123 is a deficient number, since it is larger than the sum of its proper divisors (58355637).

131202123 is a wasteful number, since it uses less digits than its factorization.

131202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20818.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131202123 is about 11454.3495232161. The cubic root of 131202123 is about 508.1363778658.

Adding to 131202123 its reverse (321202131), we get a palindrome (452404254).

The spelling of 131202123 in words is "one hundred thirty-one million, two hundred two thousand, one hundred twenty-three".