20021002102012 has 12 divisors (see below), whose sum is σ = 36244917598680. Its totient is φ = 9665311359536.

The previous prime is 20021002102009. The next prime is 20021002102039. The reversal of 20021002102012 is 21020120012002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021002101983 and 20021002102001.

It is a congruent number.

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, 86297422738 + ... + 86297422969.

It is an arithmetic number, because the mean of its divisors is an integer number (3020409799890).

Almost surely, 2^{20021002102012} is an apocalyptic number.

It is an amenable number.

20021002102012 is a deficient number, since it is larger than the sum of its proper divisors (16223915496668).

20021002102012 is a wasteful number, since it uses less digits than its factorization.

20021002102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172594845740 (or 172594845738 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021002102012 its reverse (21020120012002), we get a palindrome (41041122114014).

The spelling of 20021002102012 in words is "twenty trillion, twenty-one billion, two million, one hundred two thousand, twelve".