2001021093 has 6 divisors (see below), whose sum is σ = 2890363814. Its totient is φ = 1334014056.

The previous prime is 2001021073. The next prime is 2001021097. The reversal of 2001021093 is 3901201002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1925278884 + 75742209 = 43878^2 + 8703^2 .

It is not a de Polignac number, because 2001021093 - 2¹⁰ = 2001020069 is a prime.

It is a super-3 number, since 3×2001021093³ (a number of 29 digits) contains 333 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 (2001021097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111167830 + ... + 111167847.

Almost surely, 2^2001021093 is an apocalyptic number.

It is an amenable number.

2001021093 is a deficient number, since it is larger than the sum of its proper divisors (889342721).

2001021093 is a wasteful number, since it uses less digits than its factorization.

2001021093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222335683 (or 222335680 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2001021093 is about 44732.7742600434. The cubic root of 2001021093 is about 1260.1354295095.

Adding to 2001021093 its reverse (3901201002), we get a palindrome (5902222095).

The spelling of 2001021093 in words is "two billion, one million, twenty-one thousand, ninety-three".