12012420125531 has 16 divisors (see below), whose sum is σ = 14216120859840. Its totient is φ = 9931341813120.

The previous prime is 12012420125513. The next prime is 12012420125557. The reversal of 12012420125531 is 13552102421021.

It is a de Polignac number, because none of the positive numbers 2^k-12012420125531 is a prime.

It is a super-2 number, since 2×12012420125531² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012420125494 and 12012420125503.

It is not an unprimeable number, because it can be changed into a prime (12012420125581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29473880 + ... + 29878661.

It is an arithmetic number, because the mean of its divisors is an integer number (888507553740).

Almost surely, 2^{12012420125531} is an apocalyptic number.

12012420125531 is a deficient number, since it is larger than the sum of its proper divisors (2203700734309).

12012420125531 is an equidigital number, since it uses as much as digits as its factorization.

12012420125531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59353574.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 12012420125531 its reverse (13552102421021), we get a palindrome (25564522546552).

The spelling of 12012420125531 in words is "twelve trillion, twelve billion, four hundred twenty million, one hundred twenty-five thousand, five hundred thirty-one".