1130031221 has 12 divisors (see below), whose sum is σ = 1243373376. Its totient is φ = 1026248520.

The previous prime is 1130031187. The next prime is 1130031229. The reversal of 1130031221 is 1221300311.

It is a de Polignac number, because none of the positive numbers 2^k-1130031221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1130031196 and 1130031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1130031229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129230 + ... + 137696.

It is an arithmetic number, because the mean of its divisors is an integer number (103614448).

Almost surely, 2^1130031221 is an apocalyptic number.

1130031221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1130031221 is a deficient number, since it is larger than the sum of its proper divisors (113342155).

1130031221 is a wasteful number, since it uses less digits than its factorization.

1130031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9592 (or 9581 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1130031221 is about 33615.9370091033. The cubic root of 1130031221 is about 1041.5900298975.

Adding to 1130031221 its reverse (1221300311), we get a palindrome (2351331532).

The spelling of 1130031221 in words is "one billion, one hundred thirty million, thirty-one thousand, two hundred twenty-one".