10021002109 has 4 divisors (see below), whose sum is σ = 10025340640. Its totient is φ = 10016663580.

The previous prime is 10021002071. The next prime is 10021002139. The reversal of 10021002109 is 90120012001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90120012001 = 757 ⋅119048893.

It is a cyclic number.

It is not a de Polignac number, because 10021002109 - 2¹¹ = 10021000061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021002092 and 10021002101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021002139) 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 3 ways as a sum of consecutive naturals, for example, 2165799 + ... + 2170420.

It is an arithmetic number, because the mean of its divisors is an integer number (2506335160).

Almost surely, 2^10021002109 is an apocalyptic number.

It is an amenable number.

10021002109 is a deficient number, since it is larger than the sum of its proper divisors (4338531).

10021002109 is an equidigital number, since it uses as much as digits as its factorization.

10021002109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338530.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 10021002109 in words is "ten billion, twenty-one million, two thousand, one hundred nine".