20102111210213 has 2 divisors, whose sum is σ = 20102111210214. Its totient is φ = 20102111210212.

The previous prime is 20102111210197. The next prime is 20102111210219. The reversal of 20102111210213 is 31201211120102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11439019794244 + 8663091415969 = 3382162^2 + 2943313^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102111210213 - 2⁴ = 20102111210197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20102111210191 and 20102111210200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102111210219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051055605106 + 10051055605107.

It is an arithmetic number, because the mean of its divisors is an integer number (10051055605107).

Almost surely, 2^{20102111210213} is an apocalyptic number.

It is an amenable number.

20102111210213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102111210213 is an equidigital number, since it uses as much as digits as its factorization.

20102111210213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20102111210213 its reverse (31201211120102), we get a palindrome (51303322330315).

The spelling of 20102111210213 in words is "twenty trillion, one hundred two billion, one hundred eleven million, two hundred ten thousand, two hundred thirteen".