61220332213 has 2 divisors, whose sum is σ = 61220332214. Its totient is φ = 61220332212.

The previous prime is 61220332207. The next prime is 61220332249. The reversal of 61220332213 is 31223302216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35268088804 + 25952243409 = 187798^2 + 161097^2 .

It is a cyclic number.

It is not a de Polignac number, because 61220332213 - 2⁵ = 61220332181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61220332253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30610166106 + 30610166107.

It is an arithmetic number, because the mean of its divisors is an integer number (30610166107).

Almost surely, 2^61220332213 is an apocalyptic number.

It is an amenable number.

61220332213 is a deficient number, since it is larger than the sum of its proper divisors (1).

61220332213 is an equidigital number, since it uses as much as digits as its factorization.

61220332213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 61220332213 its reverse (31223302216), we get a palindrome (92443634429).

The spelling of 61220332213 in words is "sixty-one billion, two hundred twenty million, three hundred thirty-two thousand, two hundred thirteen".