1121101211 has 4 divisors (see below), whose sum is σ = 1121180424. Its totient is φ = 1121022000.

The previous prime is 1121101207. The next prime is 1121101217. The reversal of 1121101211 is 1121011211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1121011211 = 29 ⋅38655559.

It is a cyclic number.

It is not a de Polignac number, because 1121101211 - 2² = 1121101207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121101192 and 1121101201.

It is not an unprimeable number, because it can be changed into a prime (1121101217) 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, 11930 + ... + 48831.

It is an arithmetic number, because the mean of its divisors is an integer number (280295106).

Almost surely, 2^1121101211 is an apocalyptic number.

1121101211 is a deficient number, since it is larger than the sum of its proper divisors (79213).

1121101211 is an equidigital number, since it uses as much as digits as its factorization.

1121101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79212.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1121101211 is about 33482.8495053811. The cubic root of 1121101211 is about 1038.8390679065.

Adding to 1121101211 its reverse (1121011211), we get a palindrome (2242112422).

Subtracting from 1121101211 its reverse (1121011211), we obtain a square (90000 = 300²).

The spelling of 1121101211 in words is "one billion, one hundred twenty-one million, one hundred one thousand, two hundred eleven".