1021343043 has 32 divisors (see below), whose sum is σ = 1644336640. Its totient is φ = 550851840.

The previous prime is 1021343021. The next prime is 1021343093. The reversal of 1021343043 is 3403431201.

1021343043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021343043 - 2¹⁰ = 1021342019 is a prime.

It is a super-2 number, since 2×1021343043² = 2086283222968999698, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021343093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105903 + ... + 115143.

It is an arithmetic number, because the mean of its divisors is an integer number (51385520).

Almost surely, 2^1021343043 is an apocalyptic number.

1021343043 is a deficient number, since it is larger than the sum of its proper divisors (622993597).

1021343043 is a wasteful number, since it uses less digits than its factorization.

1021343043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9547.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1021343043 is about 31958.4580823293. The cubic root of 1021343043 is about 1007.0643254582.

Adding to 1021343043 its reverse (3403431201), we get a palindrome (4424774244).

The spelling of 1021343043 in words is "one billion, twenty-one million, three hundred forty-three thousand, forty-three".