20102001012009 has 48 divisors (see below), whose sum is σ = 33286885632000. Its totient is φ = 11451377911680.

The previous prime is 20102001012001. The next prime is 20102001012011. The reversal of 20102001012009 is 90021010020102.

It is not a de Polignac number, because 20102001012009 - 2³ = 20102001012001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20102001011982 and 20102001012000.

It is not an unprimeable number, because it can be changed into a prime (20102001012001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31251367 + ... + 31888115.

It is an arithmetic number, because the mean of its divisors is an integer number (693476784000).

Almost surely, 2^{20102001012009} is an apocalyptic number.

It is an amenable number.

20102001012009 is a deficient number, since it is larger than the sum of its proper divisors (13184884619991).

20102001012009 is a wasteful number, since it uses less digits than its factorization.

20102001012009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638310 (or 638307 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 20102001012009 in words is "twenty trillion, one hundred two billion, one million, twelve thousand, nine".