20000001012111 has 12 divisors (see below), whose sum is σ = 29362478718040. Its totient is φ = 13114754761680.

The previous prime is 20000001012097. The next prime is 20000001012113. The reversal of 20000001012111 is 11121010000002.

It is a happy number.

It is not a de Polignac number, because 20000001012111 - 2¹³ = 20000001003919 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000001012093 and 20000001012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000001012113) 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, 18214936621 + ... + 18214937718.

Almost surely, 2^{20000001012111} is an apocalyptic number.

20000001012111 is a deficient number, since it is larger than the sum of its proper divisors (9362477705929).

20000001012111 is a wasteful number, since it uses less digits than its factorization.

20000001012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36429874406 (or 36429874403 counting only the distinct ones).

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

Adding to 20000001012111 its reverse (11121010000002), we get a palindrome (31121011012113).

The spelling of 20000001012111 in words is "twenty trillion, one million, twelve thousand, one hundred eleven".