213022232120261 has 2 divisors, whose sum is σ = 213022232120262. Its totient is φ = 213022232120260.

The previous prime is 213022232120183. The next prime is 213022232120273. The reversal of 213022232120261 is 162021232220312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132844641930625 + 80177590189636 = 11525825^2 + 8954194^2 .

It is a cyclic number.

It is not a de Polignac number, because 213022232120261 - 2²² = 213022227925957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213022232120281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106511116060130 + 106511116060131.

It is an arithmetic number, because the mean of its divisors is an integer number (106511116060131).

Almost surely, 2^{213022232120261} is an apocalyptic number.

It is an amenable number.

213022232120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

213022232120261 is an equidigital number, since it uses as much as digits as its factorization.

213022232120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 213022232120261 its reverse (162021232220312), we get a palindrome (375043464340573).

The spelling of 213022232120261 in words is "two hundred thirteen trillion, twenty-two billion, two hundred thirty-two million, one hundred twenty thousand, two hundred sixty-one".