2002102122121 has 4 divisors (see below), whose sum is σ = 2002307707600. Its totient is φ = 2001896536644.

The previous prime is 2002102122089. The next prime is 2002102122149. The reversal of 2002102122121 is 1212212012002.

It is a happy number.

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 not a de Polignac number, because 2002102122121 - 2⁵ = 2002102122089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002102122095 and 2002102122104.

It is not an unprimeable number, because it can be changed into a prime (2002102122161) 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, 102778131 + ... + 102797608.

It is an arithmetic number, because the mean of its divisors is an integer number (500576926900).

Almost surely, 2^{2002102122121} is an apocalyptic number.

It is an amenable number.

2002102122121 is a deficient number, since it is larger than the sum of its proper divisors (205585479).

2002102122121 is an equidigital number, since it uses as much as digits as its factorization.

2002102122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205585478.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2002102122121 its reverse (1212212012002), we get a palindrome (3214314134123).

The spelling of 2002102122121 in words is "two trillion, two billion, one hundred two million, one hundred twenty-two thousand, one hundred twenty-one".