1171109020 has 12 divisors (see below), whose sum is σ = 2459328984. Its totient is φ = 468443600.

The previous prime is 1171108931. The next prime is 1171109021. The reversal of 1171109020 is 209011711.

It is a junction number, because it is equal to n+sod(n) for n = 1171108982 and 1171109000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171109021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29277706 + ... + 29277745.

It is an arithmetic number, because the mean of its divisors is an integer number (204944082).

Almost surely, 2^1171109020 is an apocalyptic number.

1171109020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171109020 is an abundant number, since it is smaller than the sum of its proper divisors (1288219964).

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

1171109020 is a wasteful number, since it uses less digits than its factorization.

1171109020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58555460 (or 58555458 counting only the distinct ones).

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

The square root of 1171109020 is about 34221.4701612891. The cubic root of 1171109020 is about 1054.0610739862.

The spelling of 1171109020 in words is "one billion, one hundred seventy-one million, one hundred nine thousand, twenty".