20001010002111 has 6 divisors (see below), whose sum is σ = 28890347780840. Its totient is φ = 13334006668068.

The previous prime is 20001010002019. The next prime is 20001010002173. The reversal of 20001010002111 is 11120001010002.

It is a happy number.

It is not a de Polignac number, because 20001010002111 - 2²¹ = 20001007904959 is a prime.

It is a super-2 number, since 2×20001010002111² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2222334444679 = 20001010002111 / (2 + 0 + 0 + 0 + 1 + 0 + 1 + 0 + 0 + 0 + 2 + 1 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001010002093 and 20001010002102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001010002011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111167222331 + ... + 1111167222348.

Almost surely, 2^{20001010002111} is an apocalyptic number.

20001010002111 is a deficient number, since it is larger than the sum of its proper divisors (8889337778729).

20001010002111 is a wasteful number, since it uses less digits than its factorization.

20001010002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222334444685 (or 2222334444682 counting only the distinct ones).

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

Adding to 20001010002111 its reverse (11120001010002), we get a palindrome (31121011012113).

It can be divided in two parts, 20001010002 and 111, that multiplied together give a palindrome (2220112110222).

The spelling of 20001010002111 in words is "twenty trillion, one billion, ten million, two thousand, one hundred eleven".