1001043102421 has 4 divisors (see below), whose sum is σ = 1009901891052. Its totient is φ = 992184313792.

The previous prime is 1001043102419. The next prime is 1001043102461. The reversal of 1001043102421 is 1242013401001.

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 516572812900 + 484470289521 = 718730^2 + 696039^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001043102421 - 2¹ = 1001043102419 is a prime.

It is a super-2 number, since 2×1001043102421² (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 (1001043102461) 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, 4429394146 + ... + 4429394371.

It is an arithmetic number, because the mean of its divisors is an integer number (252475472763).

Almost surely, 2^{1001043102421} is an apocalyptic number.

It is an amenable number.

1001043102421 is a deficient number, since it is larger than the sum of its proper divisors (8858788631).

1001043102421 is an equidigital number, since it uses as much as digits as its factorization.

1001043102421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8858788630.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1001043102421 its reverse (1242013401001), we get a palindrome (2243056503422).

The spelling of 1001043102421 in words is "one trillion, one billion, forty-three million, one hundred two thousand, four hundred twenty-one".