1013543121 has 8 divisors (see below), whose sum is σ = 1373545024. Its totient is φ = 664618320.

The previous prime is 1013543107. The next prime is 1013543159. The reversal of 1013543121 is 1213453101.

1013543121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1013543121 - 2⁷ = 1013542993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013543101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2769061 + ... + 2769426.

It is an arithmetic number, because the mean of its divisors is an integer number (171693128).

Almost surely, 2^1013543121 is an apocalyptic number.

It is an amenable number.

1013543121 is a deficient number, since it is larger than the sum of its proper divisors (360001903).

1013543121 is an equidigital number, since it uses as much as digits as its factorization.

1013543121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5538551.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1013543121 is about 31836.1919990441. The cubic root of 1013543121 is about 1004.4941460612.

Adding to 1013543121 its reverse (1213453101), we get a palindrome (2226996222).

The spelling of 1013543121 in words is "one billion, thirteen million, five hundred forty-three thousand, one hundred twenty-one".