2000212121221 has 2 divisors, whose sum is σ = 2000212121222. Its totient is φ = 2000212121220.

The previous prime is 2000212121209. The next prime is 2000212121273. The reversal of 2000212121221 is 1221212120002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1273218856900 + 726993264321 = 1128370^2 + 852639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000212121221 - 2²¹ = 2000210024069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2000212121195 and 2000212121204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000212121321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000106060610 + 1000106060611.

It is an arithmetic number, because the mean of its divisors is an integer number (1000106060611).

Almost surely, 2^{2000212121221} is an apocalyptic number.

It is an amenable number.

2000212121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000212121221 is an equidigital number, since it uses as much as digits as its factorization.

2000212121221 is an evil number, because the sum of its binary digits is even.

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

Adding to 2000212121221 its reverse (1221212120002), we get a palindrome (3221424241223).

The spelling of 2000212121221 in words is "two trillion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".