123220213013 has 2 divisors, whose sum is σ = 123220213014. Its totient is φ = 123220213012.

The previous prime is 123220212961. The next prime is 123220213069. The reversal of 123220213013 is 310312022321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116358078769 + 6862134244 = 341113^2 + 82838^2 .

It is a cyclic number.

It is not a de Polignac number, because 123220213013 - 2²⁰ = 123219164437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123220213313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61610106506 + 61610106507.

It is an arithmetic number, because the mean of its divisors is an integer number (61610106507).

Almost surely, 2^123220213013 is an apocalyptic number.

It is an amenable number.

123220213013 is a deficient number, since it is larger than the sum of its proper divisors (1).

123220213013 is an equidigital number, since it uses as much as digits as its factorization.

123220213013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123220213013 its reverse (310312022321), we get a palindrome (433532235334).

The spelling of 123220213013 in words is "one hundred twenty-three billion, two hundred twenty million, two hundred thirteen thousand, thirteen".