2112021111 has 16 divisors (see below), whose sum is σ = 2839753728. Its totient is φ = 1396192800.

The previous prime is 2112021073. The next prime is 2112021127. The reversal of 2112021111 is 1111202112.

It is not a de Polignac number, because 2112021111 - 2⁷ = 2112020983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112021311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211041 + ... + 220821.

It is an arithmetic number, because the mean of its divisors is an integer number (177484608).

Almost surely, 2^2112021111 is an apocalyptic number.

2112021111 is a deficient number, since it is larger than the sum of its proper divisors (727732617).

2112021111 is a wasteful number, since it uses less digits than its factorization.

2112021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10382.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 2112021111 is about 45956.7308563174. The cubic root of 2112021111 is about 1283.0180068741.

Adding to 2112021111 its reverse (1111202112), we get a palindrome (3223223223).

It can be divided in two parts, 211202111 and 1, that added together give a palindrome (211202112).

The spelling of 2112021111 in words is "two billion, one hundred twelve million, twenty-one thousand, one hundred eleven".