2002012121 has 8 divisors (see below), whose sum is σ = 2108410080. Its totient is φ = 1895717088.

The previous prime is 2002012093. The next prime is 2002012151. The reversal of 2002012121 is 1212102002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2002012121 - 2⁶ = 2002012057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2002012151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15950 + ... + 65256.

It is an arithmetic number, because the mean of its divisors is an integer number (263551260).

Almost surely, 2^2002012121 is an apocalyptic number.

It is an amenable number.

2002012121 is a deficient number, since it is larger than the sum of its proper divisors (106397959).

2002012121 is a wasteful number, since it uses less digits than its factorization.

2002012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51463.

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

The square root of 2002012121 is about 44743.8500913813. The cubic root of 2002012121 is about 1260.3434272146.

Adding to 2002012121 its reverse (1212102002), we get a palindrome (3214114123).

The spelling of 2002012121 in words is "two billion, two million, twelve thousand, one hundred twenty-one".