1101121111 has 4 divisors (see below), whose sum is σ = 1101217000. Its totient is φ = 1101025224.

The previous prime is 1101121061. The next prime is 1101121121. The reversal of 1101121111 is 1111211011.

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.

It is a cyclic number.

It is not a de Polignac number, because 1101121111 - 2⁷ = 1101120983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101121121) 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, 27936 + ... + 54613.

It is an arithmetic number, because the mean of its divisors is an integer number (275304250).

Almost surely, 2^1101121111 is an apocalyptic number.

1101121111 is a deficient number, since it is larger than the sum of its proper divisors (95889).

1101121111 is an equidigital number, since it uses as much as digits as its factorization.

1101121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95888.

The product of its (nonzero) digits is 2, while the sum is 10.

The square root of 1101121111 is about 33183.1449835606. The cubic root of 1101121111 is about 1032.6306935305.

Adding to 1101121111 its reverse (1111211011), we get a palindrome (2212332122).

The spelling of 1101121111 in words is "one billion, one hundred one million, one hundred twenty-one thousand, one hundred eleven".