2121211210213 has 2 divisors, whose sum is σ = 2121211210214. Its totient is φ = 2121211210212.

The previous prime is 2121211210199. The next prime is 2121211210249. The reversal of 2121211210213 is 3120121121212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1412715284929 + 708495925284 = 1188577^2 + 841722^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121211210213 - 2¹³ = 2121211202021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121211210913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060605605106 + 1060605605107.

It is an arithmetic number, because the mean of its divisors is an integer number (1060605605107).

Almost surely, 2^{2121211210213} is an apocalyptic number.

It is an amenable number.

2121211210213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121211210213 is an equidigital number, since it uses as much as digits as its factorization.

2121211210213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2121211210213 its reverse (3120121121212), we get a palindrome (5241332331425).

The spelling of 2121211210213 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, two hundred thirteen".