1101131205 has 16 divisors (see below), whose sum is σ = 1769376960. Its totient is φ = 584747648.

The previous prime is 1101131177. The next prime is 1101131237. The reversal of 1101131205 is 5021311011.

It is a cyclic number.

It is not a de Polignac number, because 1101131205 - 2⁸ = 1101130949 is a prime.

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

It is a congruent number.

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, 154035 + ... + 161024.

It is an arithmetic number, because the mean of its divisors is an integer number (110586060).

Almost surely, 2^1101131205 is an apocalyptic number.

1101131205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1101131205 is a deficient number, since it is larger than the sum of its proper divisors (668245755).

1101131205 is a wasteful number, since it uses less digits than its factorization.

1101131205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315300.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 1101131205 is about 33183.2970785002. The cubic root of 1101131205 is about 1032.6338489031.

Adding to 1101131205 its reverse (5021311011), we get a palindrome (6122442216).

The spelling of 1101131205 in words is "one billion, one hundred one million, one hundred thirty-one thousand, two hundred five".