213102212261 has 2 divisors, whose sum is σ = 213102212262. Its totient is φ = 213102212260.

The previous prime is 213102212209. The next prime is 213102212291. The reversal of 213102212261 is 162212201312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176825296036 + 36276916225 = 420506^2 + 190465^2 .

It is a cyclic number.

It is not a de Polignac number, because 213102212261 - 2¹⁴ = 213102195877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213102212291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106551106130 + 106551106131.

It is an arithmetic number, because the mean of its divisors is an integer number (106551106131).

Almost surely, 2^213102212261 is an apocalyptic number.

It is an amenable number.

213102212261 is a deficient number, since it is larger than the sum of its proper divisors (1).

213102212261 is an equidigital number, since it uses as much as digits as its factorization.

213102212261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 213102212261 its reverse (162212201312), we get a palindrome (375314413573).

The spelling of 213102212261 in words is "two hundred thirteen billion, one hundred two million, two hundred twelve thousand, two hundred sixty-one".