10001121343021 has 4 divisors (see below), whose sum is σ = 10010655301500. Its totient is φ = 9991587384544.

The previous prime is 10001121342893. The next prime is 10001121343033. The reversal of 10001121343021 is 12034312110001.

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 9009332418025 + 991788924996 = 3001555^2 + 995886^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001121343021 - 2⁷ = 10001121342893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10001121343021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001121343121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4766977666 + ... + 4766979763.

It is an arithmetic number, because the mean of its divisors is an integer number (2502663825375).

Almost surely, 2^{10001121343021} is an apocalyptic number.

It is an amenable number.

10001121343021 is a deficient number, since it is larger than the sum of its proper divisors (9533958479).

10001121343021 is an equidigital number, since it uses as much as digits as its factorization.

10001121343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9533958478.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 10001121343021 its reverse (12034312110001), we get a palindrome (22035433453022).

The spelling of 10001121343021 in words is "ten trillion, one billion, one hundred twenty-one million, three hundred forty-three thousand, twenty-one".