100431430421 has 24 divisors (see below), whose sum is σ = 123002352000. Its totient is φ = 81536704704.

The previous prime is 100431430399. The next prime is 100431430427. The reversal of 100431430421 is 124034134001.

It is a de Polignac number, because none of the positive numbers 2^k-100431430421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100431430427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6853220 + ... + 6867858.

It is an arithmetic number, because the mean of its divisors is an integer number (5125098000).

Almost surely, 2^100431430421 is an apocalyptic number.

It is an amenable number.

100431430421 is a deficient number, since it is larger than the sum of its proper divisors (22570921579).

100431430421 is a wasteful number, since it uses less digits than its factorization.

100431430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22041 (or 22034 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 100431430421 its reverse (124034134001), we get a palindrome (224465564422).

The spelling of 100431430421 in words is "one hundred billion, four hundred thirty-one million, four hundred thirty thousand, four hundred twenty-one".