20111200000011 has 24 divisors (see below), whose sum is σ = 30064819699824. Its totient is φ = 12945605207040.

The previous prime is 20111199999971. The next prime is 20111200000061. The reversal of 20111200000011 is 11000000211102.

It is a happy number.

It is not a de Polignac number, because 20111200000011 - 2¹⁴ = 20111199983627 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 = 20111199999939 and 20111200000002.

It is not an unprimeable number, because it can be changed into a prime (20111200000061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280901821 + ... + 280973406.

It is an arithmetic number, because the mean of its divisors is an integer number (1252700820826).

Almost surely, 2^{20111200000011} is an apocalyptic number.

20111200000011 is a deficient number, since it is larger than the sum of its proper divisors (9953619699813).

20111200000011 is a wasteful number, since it uses less digits than its factorization.

20111200000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561875371 (or 561875368 counting only the distinct ones).

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

Adding to 20111200000011 its reverse (11000000211102), we get a palindrome (31111200211113).

The spelling of 20111200000011 in words is "twenty trillion, one hundred eleven billion, two hundred million, eleven", and thus it is an aban number.