2102211111 has 48 divisors (see below), whose sum is σ = 3784147200. Its totient is φ = 1008034560.

The previous prime is 2102211107. The next prime is 2102211161. The reversal of 2102211111 is 1111122012.

It is not a de Polignac number, because 2102211111 - 2² = 2102211107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102211101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12115 + ... + 65963.

It is an arithmetic number, because the mean of its divisors is an integer number (78836400).

Almost surely, 2^2102211111 is an apocalyptic number.

2102211111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2102211111 is a deficient number, since it is larger than the sum of its proper divisors (1681936089).

2102211111 is a wasteful number, since it uses less digits than its factorization.

2102211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53896 (or 53883 counting only the distinct ones).

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

The square root of 2102211111 is about 45849.8758013585. The cubic root of 2102211111 is about 1281.0284522076.

Adding to 2102211111 its reverse (1111122012), we get a palindrome (3213333123).

The spelling of 2102211111 in words is "two billion, one hundred two million, two hundred eleven thousand, one hundred eleven".