1101100155 has 16 divisors (see below), whose sum is σ = 1762832160. Its totient is φ = 586896128.

The previous prime is 1101100127. The next prime is 1101100157. The reversal of 1101100155 is 5510011011.

It is a cyclic number.

It is not a de Polignac number, because 1101100155 - 2⁵ = 1101100123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1101100157) 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, 4159 + ... + 47111.

It is an arithmetic number, because the mean of its divisors is an integer number (110177010).

Almost surely, 2^1101100155 is an apocalyptic number.

1101100155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1101100155 is a deficient number, since it is larger than the sum of its proper divisors (661732005).

1101100155 is a wasteful number, since it uses less digits than its factorization.

1101100155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44670.

The product of its (nonzero) digits is 25, while the sum is 15.

The square root of 1101100155 is about 33182.8292193417. The cubic root of 1101100155 is about 1032.6241426477.

Adding to 1101100155 its reverse (5510011011), we get a palindrome (6611111166).

The spelling of 1101100155 in words is "one billion, one hundred one million, one hundred thousand, one hundred fifty-five".