12420211189825 has 48 divisors (see below), whose sum is σ = 16438443591024. Its totient is φ = 9276573081600.

The previous prime is 12420211189783. The next prime is 12420211189831. The reversal of 12420211189825 is 52898111202421.

It is a Cunningham number, because it is equal to 3524232²+1.

It can be written as a sum of positive squares in 24 ways, for example, as 9881963186481 + 2538248003344 = 3143559^2 + 1593188^2 .

It is not a de Polignac number, because 12420211189825 - 2⁷ = 12420211189697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30335877 + ... + 30742573.

It is an arithmetic number, because the mean of its divisors is an integer number (342467574813).

Almost surely, 2^{12420211189825} is an apocalyptic number.

It is an amenable number.

12420211189825 is a deficient number, since it is larger than the sum of its proper divisors (4018232401199).

12420211189825 is a wasteful number, since it uses less digits than its factorization.

12420211189825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407302 (or 407297 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 46.

The spelling of 12420211189825 in words is "twelve trillion, four hundred twenty billion, two hundred eleven million, one hundred eighty-nine thousand, eight hundred twenty-five".