100021039 has 2 divisors, whose sum is σ = 100021040. Its totient is φ = 100021038.

The previous prime is 100021003. The next prime is 100021091. The reversal of 100021039 is 930120001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100021039 - 2¹⁹ = 99496751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100028039) 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 as a sum of consecutive naturals, namely, 50010519 + 50010520.

It is an arithmetic number, because the mean of its divisors is an integer number (50010520).

Almost surely, 2^100021039 is an apocalyptic number.

100021039 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021039 is an equidigital number, since it uses as much as digits as its factorization.

100021039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 100021039 is about 10001.0518946759. The cubic root of 100021039 is about 464.1914325412.

The spelling of 100021039 in words is "one hundred million, twenty-one thousand, thirty-nine".