1043163056021 has 4 divisors (see below), whose sum is σ = 1057452960972. Its totient is φ = 1028873151072.

The previous prime is 1043163056011. The next prime is 1043163056029. The reversal of 1043163056021 is 1206503613401.

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 712352880100 + 330810175921 = 844010^2 + 575161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043163056021 - 2³⁰ = 1042089314197 is a prime.

It is a super-2 number, since 2×1043163056021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043163056029) 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, 7144952366 + ... + 7144952511.

It is an arithmetic number, because the mean of its divisors is an integer number (264363240243).

Almost surely, 2^{1043163056021} is an apocalyptic number.

It is an amenable number.

1043163056021 is a deficient number, since it is larger than the sum of its proper divisors (14289904951).

1043163056021 is an equidigital number, since it uses as much as digits as its factorization.

1043163056021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14289904950.

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 1043163056021 its reverse (1206503613401), we get a palindrome (2249666669422).

The spelling of 1043163056021 in words is "one trillion, forty-three billion, one hundred sixty-three million, fifty-six thousand, twenty-one".