1131221230 has 8 divisors (see below), whose sum is σ = 2036198232. Its totient is φ = 452488488.

The previous prime is 1131221209. The next prime is 1131221237. The reversal of 1131221230 is 321221311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1131221230² = 2559322942405425800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131221237) 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, 56561052 + ... + 56561071.

It is an arithmetic number, because the mean of its divisors is an integer number (254524779).

Almost surely, 2^1131221230 is an apocalyptic number.

1131221230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131221230 is a deficient number, since it is larger than the sum of its proper divisors (904977002).

1131221230 is a wasteful number, since it uses less digits than its factorization.

1131221230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113122130.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1131221230 is about 33633.6324235132. The cubic root of 1131221230 is about 1041.9555261908.

Adding to 1131221230 its reverse (321221311), we get a palindrome (1452442541).

The spelling of 1131221230 in words is "one billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred thirty".