1001011002001 has 4 divisors (see below), whose sum is σ = 1053695791600. Its totient is φ = 948326212404.

The previous prime is 1001011001959. The next prime is 1001011002053. The reversal of 1001011002001 is 1002001101001.

1001011002001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1001011002001 - 2⁷ = 1001011001873 is a prime.

It is a super-2 number, since 2×1001011002001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001011032001) 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, 26342394771 + ... + 26342394808.

It is an arithmetic number, because the mean of its divisors is an integer number (263423947900).

Almost surely, 2^{1001011002001} is an apocalyptic number.

It is an amenable number.

1001011002001 is a deficient number, since it is larger than the sum of its proper divisors (52684789599).

1001011002001 is an equidigital number, since it uses as much as digits as its factorization.

1001011002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52684789598.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 1001011002001 its reverse (1002001101001), we get a palindrome (2003012103002).

The spelling of 1001011002001 in words is "one trillion, one billion, eleven million, two thousand, one".