1010001021001 has 16 divisors (see below), whose sum is σ = 1157226871680. Its totient is φ = 863512876800.

The previous prime is 1010001020999. The next prime is 1010001021013. The reversal of 1010001021001 is 1001201000101.

It is not a de Polignac number, because 1010001021001 - 2¹ = 1010001020999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1010001021061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4394851 + ... + 4618951.

It is an arithmetic number, because the mean of its divisors is an integer number (72326679480).

Almost surely, 2^{1010001021001} is an apocalyptic number.

It is an amenable number.

1010001021001 is a deficient number, since it is larger than the sum of its proper divisors (147225850679).

1010001021001 is an equidigital number, since it uses as much as digits as its factorization.

1010001021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225744.

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

Adding to 1010001021001 its reverse (1001201000101), we get a palindrome (2011202021102).

The spelling of 1010001021001 in words is "one trillion, ten billion, one million, twenty-one thousand, one".