1100120211 has 20 divisors (see below), whose sum is σ = 1678360992. Its totient is φ = 717806448.

The previous prime is 1100120209. The next prime is 1100120227. The reversal of 1100120211 is 1120210011.

It is a happy number.

It is not a de Polignac number, because 1100120211 - 2¹ = 1100120209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1100120193 and 1100120202.

It is not an unprimeable number, because it can be changed into a prime (1100120611) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 140680 + ... + 148293.

Almost surely, 2^1100120211 is an apocalyptic number.

1100120211 is a deficient number, since it is larger than the sum of its proper divisors (578240781).

1100120211 is an equidigital number, since it uses as much as digits as its factorization.

1100120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289032 (or 289023 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1100120211 is about 33168.0601030570. The cubic root of 1100120211 is about 1032.3177175488.

Adding to 1100120211 its reverse (1120210011), we get a palindrome (2220330222).

The spelling of 1100120211 in words is "one billion, one hundred million, one hundred twenty thousand, two hundred eleven".