20010000201111 has 6 divisors (see below), whose sum is σ = 28903333623840. Its totient is φ = 13340000134068.

The previous prime is 20010000201101. The next prime is 20010000201133. The reversal of 20010000201111 is 11110200001002.

It is a happy number.

It is not a de Polignac number, because 20010000201111 - 2⁶ = 20010000201047 is a prime.

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: 2223333355679 = 20010000201111 / (2 + 0 + 0 + 1 + 0 + 0 + 0 + 0 + 2 + 0 + 1 + 1 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 20010000201093 and 20010000201102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010000201101) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1111666677831 + ... + 1111666677848.

It is an arithmetic number, because the mean of its divisors is an integer number (4817222270640).

Almost surely, 2^{20010000201111} is an apocalyptic number.

20010000201111 is a deficient number, since it is larger than the sum of its proper divisors (8893333422729).

20010000201111 is a wasteful number, since it uses less digits than its factorization.

20010000201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223333355685 (or 2223333355682 counting only the distinct ones).

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

Adding to 20010000201111 its reverse (11110200001002), we get a palindrome (31120200202113).

The spelling of 20010000201111 in words is "twenty trillion, ten billion, two hundred one thousand, one hundred eleven".