131212023144040 has 128 divisors (see below), whose sum is σ = 310130402192640. Its totient is φ = 49866305550336.

The previous prime is 131212023144029. The next prime is 131212023144049. The reversal of 131212023144040 is 40441320212131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (131212023144049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262630314 + ... + 263129446.

It is an arithmetic number, because the mean of its divisors is an integer number (2422893767130).

Almost surely, 2^{131212023144040} is an apocalyptic number.

131212023144040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131212023144040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155065201096320).

131212023144040 is an abundant number, since it is smaller than the sum of its proper divisors (178918379048600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131212023144040 is a wasteful number, since it uses less digits than its factorization.

131212023144040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501083 (or 501079 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 131212023144040 its reverse (40441320212131), we get a palindrome (171653343356171).

The spelling of 131212023144040 in words is "one hundred thirty-one trillion, two hundred twelve billion, twenty-three million, one hundred forty-four thousand, forty".