20101120002009 has 12 divisors (see below), whose sum is σ = 29034990008752. Its totient is φ = 13400728716600.

The previous prime is 20101120001993. The next prime is 20101120002013. The reversal of 20101120002009 is 90020002110102.

It is not a de Polignac number, because 20101120002009 - 2⁴ = 20101120001993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101120001982 and 20101120002000.

It is not an unprimeable number, because it can be changed into a prime (20101120002059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12084594 + ... + 13646964.

Almost surely, 2^{20101120002009} is an apocalyptic number.

It is an amenable number.

20101120002009 is a deficient number, since it is larger than the sum of its proper divisors (8933870006743).

20101120002009 is a wasteful number, since it uses less digits than its factorization.

20101120002009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991908 (or 2991905 counting only the distinct ones).

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

The spelling of 20101120002009 in words is "twenty trillion, one hundred one billion, one hundred twenty million, two thousand, nine".