100430434421 has 32 divisors (see below), whose sum is σ = 113554172160. Its totient is φ = 88315628544.

The previous prime is 100430434399. The next prime is 100430434459. The reversal of 100430434421 is 124434034001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100430434421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100430434921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4734986 + ... + 4756148.

It is an arithmetic number, because the mean of its divisors is an integer number (3548567880).

Almost surely, 2^100430434421 is an apocalyptic number.

It is an amenable number.

100430434421 is a deficient number, since it is larger than the sum of its proper divisors (13123737739).

100430434421 is a wasteful number, since it uses less digits than its factorization.

100430434421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21485.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 100430434421 its reverse (124434034001), we get a palindrome (224864468422).

The spelling of 100430434421 in words is "one hundred billion, four hundred thirty million, four hundred thirty-four thousand, four hundred twenty-one".