131212011333123 has 20 divisors (see below), whose sum is σ = 224009218643760. Its totient is φ = 74978292190032.

The previous prime is 131212011333119. The next prime is 131212011333157. The reversal of 131212011333123 is 321333110212131.

131212011333123 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 1 + 201 + 1 + 333 + 123 = 666.

It is not a de Polignac number, because 131212011333123 - 2² = 131212011333119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (131212011333163) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 115707240468 + ... + 115707241601.

It is an arithmetic number, because the mean of its divisors is an integer number (11200460932188).

Almost surely, 2^{131212011333123} is an apocalyptic number.

131212011333123 is a deficient number, since it is larger than the sum of its proper divisors (92797207310637).

131212011333123 is an equidigital number, since it uses as much as digits as its factorization.

131212011333123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231414482088 (or 231414482079 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

Adding to 131212011333123 its reverse (321333110212131), we get a palindrome (452545121545254).

The spelling of 131212011333123 in words is "one hundred thirty-one trillion, two hundred twelve billion, eleven million, three hundred thirty-three thousand, one hundred twenty-three".