20100021002002 has 8 divisors (see below), whose sum is σ = 30150052810812. Its totient is φ = 10050003398400.

The previous prime is 20100021001987. The next prime is 20100021002051. The reversal of 20100021002002 is 20020012000102.

It can be written as a sum of positive squares in 2 ways, for example, as 18204908091841 + 1895112910161 = 4266721^2 + 1376631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20100021002002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1325602 + ... + 6477442.

Almost surely, 2^{20100021002002} is an apocalyptic number.

20100021002002 is a deficient number, since it is larger than the sum of its proper divisors (10050031808810).

20100021002002 is a wasteful number, since it uses less digits than its factorization.

20100021002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102604.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20100021002002 its reverse (20020012000102), we get a palindrome (40120033002104).

The spelling of 20100021002002 in words is "twenty trillion, one hundred billion, twenty-one million, two thousand, two".