100420638529 has 2 divisors, whose sum is σ = 100420638530. Its totient is φ = 100420638528.

The previous prime is 100420638523. The next prime is 100420638569. The reversal of 100420638529 is 925836024001.

It is an a-pointer prime, because the next prime (100420638569) can be obtained adding 100420638529 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50301518400 + 50119120129 = 224280^2 + 223873^2 .

It is a cyclic number.

It is not a de Polignac number, because 100420638529 - 2²⁵ = 100387084097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100420638491 and 100420638500.

It is not a weakly prime, because it can be changed into another prime (100420638523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50210319264 + 50210319265.

It is an arithmetic number, because the mean of its divisors is an integer number (50210319265).

Almost surely, 2^100420638529 is an apocalyptic number.

It is an amenable number.

100420638529 is a deficient number, since it is larger than the sum of its proper divisors (1).

100420638529 is an equidigital number, since it uses as much as digits as its factorization.

100420638529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 100420638529 in words is "one hundred billion, four hundred twenty million, six hundred thirty-eight thousand, five hundred twenty-nine".