2012121122111 has 4 divisors (see below), whose sum is σ = 2012140204512. Its totient is φ = 2012102039712.

The previous prime is 2012121122071. The next prime is 2012121122161. The reversal of 2012121122111 is 1112211212102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2012121122111 - 2⁶ = 2012121122047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012121122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012121122161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9382151 + ... + 9594216.

It is an arithmetic number, because the mean of its divisors is an integer number (503035051128).

Almost surely, 2^{2012121122111} is an apocalyptic number.

2012121122111 is a deficient number, since it is larger than the sum of its proper divisors (19082401).

2012121122111 is a wasteful number, since it uses less digits than its factorization.

2012121122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19082400.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2012121122111 its reverse (1112211212102), we get a palindrome (3124332334213).

The spelling of 2012121122111 in words is "two trillion, twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".