20212021201213 has 2 divisors, whose sum is σ = 20212021201214. Its totient is φ = 20212021201212.

The previous prime is 20212021201159. The next prime is 20212021201223. The reversal of 20212021201213 is 31210212021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20212019825284 + 1375929 = 4495778^2 + 1173^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212021201213 - 2³³ = 20203431266621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212021201223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106010600606 + 10106010600607.

It is an arithmetic number, because the mean of its divisors is an integer number (10106010600607).

Almost surely, 2^{20212021201213} is an apocalyptic number.

It is an amenable number.

20212021201213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212021201213 is an equidigital number, since it uses as much as digits as its factorization.

20212021201213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20212021201213 its reverse (31210212021202), we get a palindrome (51422233222415).

The spelling of 20212021201213 in words is "twenty trillion, two hundred twelve billion, twenty-one million, two hundred one thousand, two hundred thirteen".