12425513981 has 2 divisors, whose sum is σ = 12425513982. Its totient is φ = 12425513980.

The previous prime is 12425513959. The next prime is 12425513987. The reversal of 12425513981 is 18931552421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10074136900 + 2351377081 = 100370^2 + 48491^2 .

It is a cyclic number.

It is not a de Polignac number, because 12425513981 - 2⁶ = 12425513917 is a prime.

It is a super-2 number, since 2×12425513981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12425513987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6212756990 + 6212756991.

It is an arithmetic number, because the mean of its divisors is an integer number (6212756991).

Almost surely, 2^12425513981 is an apocalyptic number.

It is an amenable number.

12425513981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12425513981 is an equidigital number, since it uses as much as digits as its factorization.

12425513981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The spelling of 12425513981 in words is "twelve billion, four hundred twenty-five million, five hundred thirteen thousand, nine hundred eighty-one".