2000121121 has 2 divisors, whose sum is σ = 2000121122. Its totient is φ = 2000121120.

The previous prime is 2000121113. The next prime is 2000121161. The reversal of 2000121121 is 1211210002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1255922721 + 744198400 = 35439^2 + 27280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000121121 - 2³ = 2000121113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2000121098 and 2000121107.

It is not a weakly prime, because it can be changed into another prime (2000121161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000060560 + 1000060561.

It is an arithmetic number, because the mean of its divisors is an integer number (1000060561).

Almost surely, 2^2000121121 is an apocalyptic number.

It is an amenable number.

2000121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000121121 is an equidigital number, since it uses as much as digits as its factorization.

2000121121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2000121121 is about 44722.7137034416. The cubic root of 2000121121 is about 1259.9464831977.

Adding to 2000121121 its reverse (1211210002), we get a palindrome (3211331123).

The spelling of 2000121121 in words is "two billion, one hundred twenty-one thousand, one hundred twenty-one".