1131220230 has 64 divisors (see below), whose sum is σ = 3108284928. Its totient is φ = 258105600.

The previous prime is 1131220199. The next prime is 1131220241. The reversal of 1131220230 is 320221311.

It is a super-2 number, since 2×1131220230² = 2559318417522505800, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121729 + ... + 130691.

It is an arithmetic number, because the mean of its divisors is an integer number (48566952).

Almost surely, 2^1131220230 is an apocalyptic number.

1131220230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131220230 is an abundant number, since it is smaller than the sum of its proper divisors (1977064698).

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

1131220230 is a wasteful number, since it uses less digits than its factorization.

1131220230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9581.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1131220230 is about 33633.6175574380. The cubic root of 1131220230 is about 1041.9552191610.

Adding to 1131220230 its reverse (320221311), we get a palindrome (1451441541).

The spelling of 1131220230 in words is "one billion, one hundred thirty-one million, two hundred twenty thousand, two hundred thirty".