131212031223 has 16 divisors (see below), whose sum is σ = 215322308096. Its totient is φ = 69210741600.

The previous prime is 131212031221. The next prime is 131212031233. The reversal of 131212031223 is 322130212131.

It is not a de Polignac number, because 131212031223 - 2¹ = 131212031221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 131212031223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131212031221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240314803 + ... + 240315348.

It is an arithmetic number, because the mean of its divisors is an integer number (13457644256).

Almost surely, 2^131212031223 is an apocalyptic number.

131212031223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131212031223 is a deficient number, since it is larger than the sum of its proper divisors (84110276873).

131212031223 is a wasteful number, since it uses less digits than its factorization.

131212031223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480630174.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131212031223 its reverse (322130212131), we get a palindrome (453342243354).

The spelling of 131212031223 in words is "one hundred thirty-one billion, two hundred twelve million, thirty-one thousand, two hundred twenty-three".