100203323021 has 2 divisors, whose sum is σ = 100203323022. Its totient is φ = 100203323020.

The previous prime is 100203322987. The next prime is 100203323027. The reversal of 100203323021 is 120323302001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91996956100 + 8206366921 = 303310^2 + 90589^2 .

It is a cyclic number.

It is not a de Polignac number, because 100203323021 - 2¹⁰ = 100203321997 is a prime.

It is a super-3 number, since 3×100203323021³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100203323027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50101661510 + 50101661511.

It is an arithmetic number, because the mean of its divisors is an integer number (50101661511).

Almost surely, 2^100203323021 is an apocalyptic number.

It is an amenable number.

100203323021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100203323021 is an equidigital number, since it uses as much as digits as its factorization.

100203323021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 100203323021 its reverse (120323302001), we get a palindrome (220526625022).

The spelling of 100203323021 in words is "one hundred billion, two hundred three million, three hundred twenty-three thousand, twenty-one".