1013180821 has 4 divisors (see below), whose sum is σ = 1023017632. Its totient is φ = 1003344012.

The previous prime is 1013180813. The next prime is 1013180837. The reversal of 1013180821 is 1280813101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1280813101 = 29 ⋅44165969.

It is not a de Polignac number, because 1013180821 - 2³ = 1013180813 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 (1013180881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4918251 + ... + 4918456.

It is an arithmetic number, because the mean of its divisors is an integer number (255754408).

Almost surely, 2^1013180821 is an apocalyptic number.

It is an amenable number.

1013180821 is a deficient number, since it is larger than the sum of its proper divisors (9836811).

1013180821 is an equidigital number, since it uses as much as digits as its factorization.

1013180821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9836810.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 1013180821 is about 31830.5014255195. The cubic root of 1013180821 is about 1004.3744433427.

Adding to 1013180821 its reverse (1280813101), we get a palindrome (2293993922).

The spelling of 1013180821 in words is "one billion, thirteen million, one hundred eighty thousand, eight hundred twenty-one".