1011112155 has 24 divisors (see below), whose sum is σ = 1762291440. Its totient is φ = 536276160.

The previous prime is 1011112099. The next prime is 1011112159. The reversal of 1011112155 is 5512111101.

1011112155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011112155 - 2²⁸ = 742676699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011112159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53925 + ... + 70214.

It is an arithmetic number, because the mean of its divisors is an integer number (73428810).

Almost surely, 2^1011112155 is an apocalyptic number.

1011112155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1011112155 is a deficient number, since it is larger than the sum of its proper divisors (751179285).

1011112155 is a wasteful number, since it uses less digits than its factorization.

1011112155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124331 (or 124328 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 18.

The square root of 1011112155 is about 31797.9897949540. The cubic root of 1011112155 is about 1003.6904157448.

Adding to 1011112155 its reverse (5512111101), we get a palindrome (6523223256).

It can be divided in two parts, 10111121 and 55, that multiplied together give a palindrome (556111655).

The spelling of 1011112155 in words is "one billion, eleven million, one hundred twelve thousand, one hundred fifty-five".