1130236821 has 20 divisors (see below), whose sum is σ = 1929576352. Its totient is φ = 645849288.

The previous prime is 1130236801. The next prime is 1130236841. The reversal of 1130236821 is 1286320311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1130236801) and next prime (1130236841).

It is not a de Polignac number, because 1130236821 - 2⁹ = 1130236309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1130236801) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 996115 + ... + 997248.

Almost surely, 2^1130236821 is an apocalyptic number.

It is an amenable number.

1130236821 is a deficient number, since it is larger than the sum of its proper divisors (799339531).

1130236821 is an equidigital number, since it uses as much as digits as its factorization.

1130236821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993382 (or 1993373 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1130236821 is about 33618.9949433352. The cubic root of 1130236821 is about 1041.6531956814.

The spelling of 1130236821 in words is "one billion, one hundred thirty million, two hundred thirty-six thousand, eight hundred twenty-one".