1130139821 has 4 divisors (see below), whose sum is σ = 1196618652. Its totient is φ = 1063660992.

The previous prime is 1130139811. The next prime is 1130139833. The reversal of 1130139821 is 1289310311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 540330025 + 589809796 = 23245^2 + 24286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1130139821 - 2¹⁴ = 1130123437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1130139811) 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, 33239390 + ... + 33239423.

It is an arithmetic number, because the mean of its divisors is an integer number (299154663).

Almost surely, 2^1130139821 is an apocalyptic number.

It is an amenable number.

1130139821 is a deficient number, since it is larger than the sum of its proper divisors (66478831).

1130139821 is an equidigital number, since it uses as much as digits as its factorization.

1130139821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66478830.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1130139821 is about 33617.5522755599. The cubic root of 1130139821 is about 1041.6233956582.

The spelling of 1130139821 in words is "one billion, one hundred thirty million, one hundred thirty-nine thousand, eight hundred twenty-one".