1121111155 has 8 divisors (see below), whose sum is σ = 1424470752. Its totient is φ = 844130688.

The previous prime is 1121111119. The next prime is 1121111161. The reversal of 1121111155 is 5511111211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121111155 - 2⁷ = 1121111027 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6594687 + ... + 6594856.

It is an arithmetic number, because the mean of its divisors is an integer number (178058844).

Almost surely, 2^1121111155 is an apocalyptic number.

1121111155 is a deficient number, since it is larger than the sum of its proper divisors (303359597).

1121111155 is a wasteful number, since it uses less digits than its factorization.

1121111155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13189565.

The product of its digits is 50, while the sum is 19.

The square root of 1121111155 is about 33482.9979989845. The cubic root of 1121111155 is about 1038.8421393465.

Adding to 1121111155 its reverse (5511111211), we get a palindrome (6632222366).

It can be divided in two parts, 11211 and 11155, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 1121111155 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred fifty-five".