1113309869821 has 2 divisors, whose sum is σ = 1113309869822. Its totient is φ = 1113309869820.

The previous prime is 1113309869813. The next prime is 1113309869887. The reversal of 1113309869821 is 1289689033111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 748839276025 + 364470593796 = 865355^2 + 603714^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113309869821 - 2³ = 1113309869813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113309869801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556654934910 + 556654934911.

It is an arithmetic number, because the mean of its divisors is an integer number (556654934911).

Almost surely, 2^{1113309869821} is an apocalyptic number.

It is an amenable number.

1113309869821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113309869821 is an equidigital number, since it uses as much as digits as its factorization.

1113309869821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 1113309869821 in words is "one trillion, one hundred thirteen billion, three hundred nine million, eight hundred sixty-nine thousand, eight hundred twenty-one".