1013543210221 has 4 divisors (see below), whose sum is σ = 1013709671100. Its totient is φ = 1013376749344.

The previous prime is 1013543210219. The next prime is 1013543210357. The reversal of 1013543210221 is 1220123453101.

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 650621305321 + 362921904900 = 806611^2 + 602430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013543210221 - 2¹ = 1013543210219 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 (1013543210621) 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, 83221306 + ... + 83233483.

It is an arithmetic number, because the mean of its divisors is an integer number (253427417775).

Almost surely, 2^{1013543210221} is an apocalyptic number.

It is an amenable number.

1013543210221 is a deficient number, since it is larger than the sum of its proper divisors (166460879).

1013543210221 is an equidigital number, since it uses as much as digits as its factorization.

1013543210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166460878.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1013543210221 its reverse (1220123453101), we get a palindrome (2233666663322).

The spelling of 1013543210221 in words is "one trillion, thirteen billion, five hundred forty-three million, two hundred ten thousand, two hundred twenty-one".