12420134202031 has 2 divisors, whose sum is σ = 12420134202032. Its totient is φ = 12420134202030.

The previous prime is 12420134202013. The next prime is 12420134202103. The reversal of 12420134202031 is 13020243102421.

Together with next prime (12420134202103) it forms an Ormiston pair, because they use the same digits, order apart.

Together with previous prime (12420134202013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12420134202031 - 2²¹ = 12420132104879 is a prime.

It is a super-2 number, since 2×12420134202031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12420134201987 and 12420134202005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12420134202331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210067101015 + 6210067101016.

It is an arithmetic number, because the mean of its divisors is an integer number (6210067101016).

Almost surely, 2^{12420134202031} is an apocalyptic number.

12420134202031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420134202031 is an equidigital number, since it uses as much as digits as its factorization.

12420134202031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 12420134202031 its reverse (13020243102421), we get a palindrome (25440377304452).

The spelling of 12420134202031 in words is "twelve trillion, four hundred twenty billion, one hundred thirty-four million, two hundred two thousand, thirty-one".