211021202213 has 2 divisors, whose sum is σ = 211021202214. Its totient is φ = 211021202212.

The previous prime is 211021202207. The next prime is 211021202221. The reversal of 211021202213 is 312202120112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124162502689 + 86858699524 = 352367^2 + 294718^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021202213 - 2¹² = 211021198117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211021202191 and 211021202200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211021202243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510601106 + 105510601107.

It is an arithmetic number, because the mean of its divisors is an integer number (105510601107).

Almost surely, 2^211021202213 is an apocalyptic number.

It is an amenable number.

211021202213 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021202213 is an equidigital number, since it uses as much as digits as its factorization.

211021202213 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 211021202213 its reverse (312202120112), we get a palindrome (523223322325).

The spelling of 211021202213 in words is "two hundred eleven billion, twenty-one million, two hundred two thousand, two hundred thirteen".