21210011039 has 32 divisors (see below), whose sum is σ = 26595440640. Its totient is φ = 16514467200.

The previous prime is 21210011033. The next prime is 21210011041. The reversal of 21210011039 is 93011001212.

It is not a de Polignac number, because 21210011039 - 2⁴ = 21210011023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21210011039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210011033) 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 31 ways as a sum of consecutive naturals, for example, 247574 + ... + 322044.

It is an arithmetic number, because the mean of its divisors is an integer number (831107520).

Almost surely, 2^21210011039 is an apocalyptic number.

21210011039 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21210011039 is a deficient number, since it is larger than the sum of its proper divisors (5385429601).

21210011039 is a wasteful number, since it uses less digits than its factorization.

21210011039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74591.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 21210011039 in words is "twenty-one billion, two hundred ten million, eleven thousand, thirty-nine".