20001012100011 has 36 divisors (see below), whose sum is σ = 30598667451768. Its totient is φ = 12587580776448.

The previous prime is 20001012099953. The next prime is 20001012100021. The reversal of 20001012100011 is 11000121010002.

It is a happy number.

It is not a de Polignac number, because 20001012100011 - 2¹⁷ = 20001011968939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20001012099966 and 20001012100002.

It is not an unprimeable number, because it can be changed into a prime (20001012100021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9956950 + ... + 11795883.

Almost surely, 2^{20001012100011} is an apocalyptic number.

20001012100011 is a deficient number, since it is larger than the sum of its proper divisors (10597655351757).

20001012100011 is a wasteful number, since it uses less digits than its factorization.

20001012100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753160 (or 21753138 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20001012100011 its reverse (11000121010002), we get a palindrome (31001133110013).

The spelling of 20001012100011 in words is "twenty trillion, one billion, twelve million, one hundred thousand, eleven".