1001011002221 has 8 divisors (see below), whose sum is σ = 1033321977600. Its totient is φ = 968701295520.

The previous prime is 1001011002181. The next prime is 1001011002239. The reversal of 1001011002221 is 1222001101001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001011002221 - 2¹⁴ = 1001010985837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001011005221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1441145 + ... + 2019633.

It is an arithmetic number, because the mean of its divisors is an integer number (129165247200).

Almost surely, 2^{1001011002221} is an apocalyptic number.

It is an amenable number.

1001011002221 is a deficient number, since it is larger than the sum of its proper divisors (32310975379).

1001011002221 is an equidigital number, since it uses as much as digits as its factorization.

1001011002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634339.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001011002221 its reverse (1222001101001), we get a palindrome (2223012103222).

The spelling of 1001011002221 in words is "one trillion, one billion, eleven million, two thousand, two hundred twenty-one".