1121013555 has 16 divisors (see below), whose sum is σ = 1816327680. Its totient is φ = 590305248.

The previous prime is 1121013529. The next prime is 1121013563. The reversal of 1121013555 is 5553101211.

It is not a de Polignac number, because 1121013555 - 2¹² = 1121009459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471817 + ... + 474186.

It is an arithmetic number, because the mean of its divisors is an integer number (113520480).

Almost surely, 2^1121013555 is an apocalyptic number.

1121013555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121013555 is a deficient number, since it is larger than the sum of its proper divisors (695314125).

1121013555 is an equidigital number, since it uses as much as digits as its factorization.

1121013555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946090.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1121013555 is about 33481.5405111533. The cubic root of 1121013555 is about 1038.8119924888.

Adding to 1121013555 its reverse (5553101211), we get a palindrome (6674114766).

The spelling of 1121013555 in words is "one billion, one hundred twenty-one million, thirteen thousand, five hundred fifty-five".