1121111115 has 8 divisors (see below), whose sum is σ = 1793777808. Its totient is φ = 597925920.

The previous prime is 1121111111. The next prime is 1121111119. The reversal of 1121111115 is 5111111211.

It is an interprime number because it is at equal distance from previous prime (1121111111) and next prime (1121111119).

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

It is not a de Polignac number, because 1121111115 - 2² = 1121111111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 74740741 = 1121111115 / (1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 1121111094 and 1121111103.

It is not an unprimeable number, because it can be changed into a prime (1121111111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37370356 + ... + 37370385.

It is an arithmetic number, because the mean of its divisors is an integer number (224222226).

Almost surely, 2^1121111115 is an apocalyptic number.

1121111115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121111115 is a deficient number, since it is larger than the sum of its proper divisors (672666693).

1121111115 is an equidigital number, since it uses as much as digits as its factorization.

1121111115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74740749.

The product of its digits is 10, while the sum is 15.

The square root of 1121111115 is about 33482.9974016664. The cubic root of 1121111115 is about 1038.8421269916.

Adding to 1121111115 its reverse (5111111211), we get a palindrome (6232222326).

The spelling of 1121111115 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred fifteen".