100005434021 has 2 divisors, whose sum is σ = 100005434022. Its totient is φ = 100005434020.

The previous prime is 100005433933. The next prime is 100005434041. The reversal of 100005434021 is 120434500001.

It is an a-pointer prime, because the next prime (100005434041) can be obtained adding 100005434021 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76335611521 + 23669822500 = 276289^2 + 153850^2 .

It is a cyclic number.

It is not a de Polignac number, because 100005434021 - 2¹⁴ = 100005417637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100005433984 and 100005434002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100005434041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50002717010 + 50002717011.

It is an arithmetic number, because the mean of its divisors is an integer number (50002717011).

Almost surely, 2^100005434021 is an apocalyptic number.

It is an amenable number.

100005434021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100005434021 is an equidigital number, since it uses as much as digits as its factorization.

100005434021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 100005434021 its reverse (120434500001), we get a palindrome (220439934022).

The spelling of 100005434021 in words is "one hundred billion, five million, four hundred thirty-four thousand, twenty-one".