1135521220 has 24 divisors (see below), whose sum is σ = 2390145408. Its totient is φ = 453151200.

The previous prime is 1135521217. The next prime is 1135521251. The reversal of 1135521220 is 221255311.

It is a junction number, because it is equal to n+sod(n) for n = 1135521191 and 1135521200.

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, 57246 + ... + 74485.

It is an arithmetic number, because the mean of its divisors is an integer number (99589392).

Almost surely, 2^1135521220 is an apocalyptic number.

1135521220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1135521220 is an abundant number, since it is smaller than the sum of its proper divisors (1254624188).

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

1135521220 is a wasteful number, since it uses less digits than its factorization.

1135521220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132171 (or 132169 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1135521220 is about 33697.4957526520. The cubic root of 1135521220 is about 1043.2740815214.

Adding to 1135521220 its reverse (221255311), we get a palindrome (1356776531).

The spelling of 1135521220 in words is "one billion, one hundred thirty-five million, five hundred twenty-one thousand, two hundred twenty".