100031421 has 8 divisors (see below), whose sum is σ = 152428864. Its totient is φ = 57160800.

The previous prime is 100031419. The next prime is 100031443. The reversal of 100031421 is 124130001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100031421 - 2¹ = 100031419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100031397 and 100031406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100031471) 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 7 ways as a sum of consecutive naturals, for example, 2381680 + ... + 2381721.

It is an arithmetic number, because the mean of its divisors is an integer number (19053608).

Almost surely, 2^100031421 is an apocalyptic number.

It is an amenable number.

100031421 is a deficient number, since it is larger than the sum of its proper divisors (52397443).

100031421 is an equidigital number, since it uses as much as digits as its factorization.

100031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763411.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 100031421 is about 10001.5709266095. The cubic root of 100031421 is about 464.2074927247.

Adding to 100031421 its reverse (124130001), we get a palindrome (224161422).

The spelling of 100031421 in words is "one hundred million, thirty-one thousand, four hundred twenty-one".