2000020121 has 8 divisors (see below), whose sum is σ = 2184141024. Its totient is φ = 1816282720.

The previous prime is 2000020117. The next prime is 2000020129. The reversal of 2000020121 is 1210200002.

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 2000020121 - 2² = 2000020117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2000020099 and 2000020108.

It is not an unprimeable number, because it can be changed into a prime (2000020129) 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, 84911 + ... + 105876.

It is an arithmetic number, because the mean of its divisors is an integer number (273017628).

Almost surely, 2^2000020121 is an apocalyptic number.

It is an amenable number.

2000020121 is a deficient number, since it is larger than the sum of its proper divisors (184120903).

2000020121 is a wasteful number, since it uses less digits than its factorization.

2000020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191751.

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

The square root of 2000020121 is about 44721.5845090489. The cubic root of 2000020121 is about 1259.9252750259.

Adding to 2000020121 its reverse (1210200002), we get a palindrome (3210220123).

The spelling of 2000020121 in words is "two billion, twenty thousand, one hundred twenty-one".