2002121201 has 4 divisors (see below), whose sum is σ = 2002583412. Its totient is φ = 2001658992.

The previous prime is 2002121197. The next prime is 2002121207. The reversal of 2002121201 is 1021212002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 939361201 + 1062760000 = 30649^2 + 32600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002121201 - 2² = 2002121197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002121207) 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, 224546 + ... + 233291.

It is an arithmetic number, because the mean of its divisors is an integer number (500645853).

Almost surely, 2^2002121201 is an apocalyptic number.

It is an amenable number.

2002121201 is a deficient number, since it is larger than the sum of its proper divisors (462211).

2002121201 is an equidigital number, since it uses as much as digits as its factorization.

2002121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462210.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2002121201 is about 44745.0690132444. The cubic root of 2002121201 is about 1260.3663168137.

Adding to 2002121201 its reverse (1021212002), we get a palindrome (3023333203).

The spelling of 2002121201 in words is "two billion, two million, one hundred twenty-one thousand, two hundred one".