100203430021 has 8 divisors (see below), whose sum is σ = 106127843544. Its totient is φ = 94282360320.

The previous prime is 100203430001. The next prime is 100203430049. The reversal of 100203430021 is 120034302001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55138084225 + 45065345796 = 234815^2 + 212286^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100203430021 - 2¹⁵ = 100203397253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100203429977 and 100203430004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100203430001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774120 + ... + 894241.

It is an arithmetic number, because the mean of its divisors is an integer number (13265980443).

Almost surely, 2^100203430021 is an apocalyptic number.

It is an amenable number.

100203430021 is a deficient number, since it is larger than the sum of its proper divisors (5924413523).

100203430021 is a wasteful number, since it uses less digits than its factorization.

100203430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671911.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 100203430021 its reverse (120034302001), we get a palindrome (220237732022).

The spelling of 100203430021 in words is "one hundred billion, two hundred three million, four hundred thirty thousand, twenty-one".