1011120555 has 16 divisors (see below), whose sum is σ = 1618302240. Its totient is φ = 539094528.

The previous prime is 1011120553. The next prime is 1011120589. The reversal of 1011120555 is 5550211101.

It is not a de Polignac number, because 1011120555 - 2¹ = 1011120553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011120553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49669 + ... + 67001.

It is an arithmetic number, because the mean of its divisors is an integer number (101143890).

Almost surely, 2^1011120555 is an apocalyptic number.

1011120555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1011120555 is a deficient number, since it is larger than the sum of its proper divisors (607181685).

1011120555 is a wasteful number, since it uses less digits than its factorization.

1011120555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21230.

The product of its (nonzero) digits is 250, while the sum is 21.

The square root of 1011120555 is about 31798.1218785009. The cubic root of 1011120555 is about 1003.6931951846.

Adding to 1011120555 its reverse (5550211101), we get a palindrome (6561331656).

The spelling of 1011120555 in words is "one billion, eleven million, one hundred twenty thousand, five hundred fifty-five".