1091071120 has 40 divisors (see below), whose sum is σ = 2551961664. Its totient is φ = 433809792.

The previous prime is 1091071103. The next prime is 1091071123. The reversal of 1091071120 is 211701901.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1091071091 and 1091071100.

It is not an unprimeable number, because it can be changed into a prime (1091071123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27474 + ... + 54193.

Almost surely, 2^1091071120 is an apocalyptic number.

1091071120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091071120 is an abundant number, since it is smaller than the sum of its proper divisors (1460890544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091071120 is a wasteful number, since it uses less digits than its factorization.

1091071120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81847 (or 81841 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 1091071120 is about 33031.3656998920. The cubic root of 1091071120 is about 1029.4794617383.

The spelling of 1091071120 in words is "one billion, ninety-one million, seventy-one thousand, one hundred twenty".