2111200012111 has 4 divisors (see below), whose sum is σ = 2111204367352. Its totient is φ = 2111195656872.

The previous prime is 2111200012099. The next prime is 2111200012189. The reversal of 2111200012111 is 1112100021112.

It is a happy number.

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 2111200012111 - 2¹³ = 2111200003919 is a prime.

It is a super-2 number, since 2×2111200012111² (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 = 2111200012091 and 2111200012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111200010111) 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, 1344165 + ... + 2455438.

It is an arithmetic number, because the mean of its divisors is an integer number (527801091838).

Almost surely, 2^{2111200012111} is an apocalyptic number.

2111200012111 is a deficient number, since it is larger than the sum of its proper divisors (4355241).

2111200012111 is an equidigital number, since it uses as much as digits as its factorization.

2111200012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4355240.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2111200012111 its reverse (1112100021112), we get a palindrome (3223300033223).

Subtracting from 2111200012111 its reverse (1112100021112), we obtain a palindrome (999099990999).

The spelling of 2111200012111 in words is "two trillion, one hundred eleven billion, two hundred million, twelve thousand, one hundred eleven".