2000122121 has 4 divisors (see below), whose sum is σ = 2000217600. Its totient is φ = 2000026644.

The previous prime is 2000122087. The next prime is 2000122129. The reversal of 2000122121 is 1212210002.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1212210002 = 2 ⋅606105001.

It is a cyclic number.

It is not a de Polignac number, because 2000122121 - 2³⁰ = 926380297 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 (2000122129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181 + ... + 63258.

It is an arithmetic number, because the mean of its divisors is an integer number (500054400).

Almost surely, 2^2000122121 is an apocalyptic number.

It is an amenable number.

2000122121 is a deficient number, since it is larger than the sum of its proper divisors (95479).

2000122121 is an equidigital number, since it uses as much as digits as its factorization.

2000122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95478.

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

The square root of 2000122121 is about 44722.7248834415. The cubic root of 2000122121 is about 1259.9466931760.

Adding to 2000122121 its reverse (1212210002), we get a palindrome (3212332123).

The spelling of 2000122121 in words is "two billion, one hundred twenty-two thousand, one hundred twenty-one".