2002121101 has 4 divisors (see below), whose sum is σ = 2007698400. Its totient is φ = 1996543804.

The previous prime is 2002121071. The next prime is 2002121129. The reversal of 2002121101 is 1011212002.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002121101 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 (2002121801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2788111 + ... + 2788828.

It is an arithmetic number, because the mean of its divisors is an integer number (501924600).

Almost surely, 2^2002121101 is an apocalyptic number.

It is an amenable number.

2002121101 is a deficient number, since it is larger than the sum of its proper divisors (5577299).

2002121101 is an equidigital number, since it uses as much as digits as its factorization.

2002121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577298.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2002121101 is about 44745.0678958028. The cubic root of 2002121101 is about 1260.3662958298.

Adding to 2002121101 its reverse (1011212002), we get a palindrome (3013333103).

Subtracting from 2002121101 its reverse (1011212002), we obtain a palindrome (990909099).

The spelling of 2002121101 in words is "two billion, two million, one hundred twenty-one thousand, one hundred one".