2001322101 has 4 divisors (see below), whose sum is σ = 2668429472. Its totient is φ = 1334214732.

The previous prime is 2001322091. The next prime is 2001322109. The reversal of 2001322101 is 1012231002.

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 2001322101 - 2²¹ = 1999224949 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 (2001322109) 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, 333553681 + ... + 333553686.

It is an arithmetic number, because the mean of its divisors is an integer number (667107368).

Almost surely, 2^2001322101 is an apocalyptic number.

It is an amenable number.

2001322101 is a deficient number, since it is larger than the sum of its proper divisors (667107371).

2001322101 is an equidigital number, since it uses as much as digits as its factorization.

2001322101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667107370.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2001322101 is about 44736.1386465126. The cubic root of 2001322101 is about 1260.1986125562.

Adding to 2001322101 its reverse (1012231002), we get a palindrome (3013553103).

The spelling of 2001322101 in words is "two billion, one million, three hundred twenty-two thousand, one hundred one".