2011012111111 has 8 divisors (see below), whose sum is σ = 2044893026304. Its totient is φ = 1977285551640.

The previous prime is 2011012111021. The next prime is 2011012111181. The reversal of 2011012111111 is 1111112101102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011012111111 - 2⁹ = 2011012110599 is a prime.

It is a super-2 number, since 2×2011012111111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011012111091 and 2011012111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011012111181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38562655 + ... + 38614768.

It is an arithmetic number, because the mean of its divisors is an integer number (255611628288).

Almost surely, 2^{2011012111111} is an apocalyptic number.

2011012111111 is a deficient number, since it is larger than the sum of its proper divisors (33880915193).

2011012111111 is an equidigital number, since it uses as much as digits as its factorization.

2011012111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77177861.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 2011012111111 its reverse (1111112101102), we get a palindrome (3122124212213).

The spelling of 2011012111111 in words is "two trillion, eleven billion, twelve million, one hundred eleven thousand, one hundred eleven".