210021100220213 has 2 divisors, whose sum is σ = 210021100220214. Its totient is φ = 210021100220212.

The previous prime is 210021100220203. The next prime is 210021100220219. The reversal of 210021100220213 is 312022001120012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208207642077604 + 1813458142609 = 14429402^2 + 1346647^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021100220213 - 2¹⁸ = 210021099958069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021100220191 and 210021100220200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210021100220219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010550110106 + 105010550110107.

It is an arithmetic number, because the mean of its divisors is an integer number (105010550110107).

Almost surely, 2^{210021100220213} is an apocalyptic number.

It is an amenable number.

210021100220213 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021100220213 is an equidigital number, since it uses as much as digits as its factorization.

210021100220213 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 17.

Adding to 210021100220213 its reverse (312022001120012), we get a palindrome (522043101340225).

The spelling of 210021100220213 in words is "two hundred ten trillion, twenty-one billion, one hundred million, two hundred twenty thousand, two hundred thirteen".