100209302021 has 4 divisors (see below), whose sum is σ = 100211846700. Its totient is φ = 100206757344.

The previous prime is 100209302003. The next prime is 100209302027. The reversal of 100209302021 is 120203902001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62267716225 + 37941585796 = 249535^2 + 194786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100209302021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100209301984 and 100209302002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100209302027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212326 + ... + 1292343.

It is an arithmetic number, because the mean of its divisors is an integer number (25052961675).

Almost surely, 2^100209302021 is an apocalyptic number.

It is an amenable number.

100209302021 is a deficient number, since it is larger than the sum of its proper divisors (2544679).

100209302021 is an equidigital number, since it uses as much as digits as its factorization.

100209302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544678.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 100209302021 in words is "one hundred billion, two hundred nine million, three hundred two thousand, twenty-one".