1135171220 has 24 divisors (see below), whose sum is σ = 2384618208. Its totient is φ = 453924000.

The previous prime is 1135171183. The next prime is 1135171253. The reversal of 1135171220 is 221715311.

It is a super-2 number, since 2×1135171220² = 2577227397432576800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74015 + ... + 88025.

It is an arithmetic number, because the mean of its divisors is an integer number (99359092).

Almost surely, 2^1135171220 is an apocalyptic number.

1135171220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1135171220 is an abundant number, since it is smaller than the sum of its proper divisors (1249446988).

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

1135171220 is a wasteful number, since it uses less digits than its factorization.

1135171220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18071 (or 18069 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 1135171220 is about 33692.3020881625. The cubic root of 1135171220 is about 1043.1668815722.

Adding to 1135171220 its reverse (221715311), we get a palindrome (1356886531).

The spelling of 1135171220 in words is "one billion, one hundred thirty-five million, one hundred seventy-one thousand, two hundred twenty".