20123320001209 has 2 divisors, whose sum is σ = 20123320001210. Its totient is φ = 20123320001208.

The previous prime is 20123320001171. The next prime is 20123320001261. The reversal of 20123320001209 is 90210002332102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18612080045584 + 1511239955625 = 4314172^2 + 1229325^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123320001209 - 2³¹ = 20121172517561 is a prime.

It is a super-2 number, since 2×20123320001209² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20123320004209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061660000604 + 10061660000605.

It is an arithmetic number, because the mean of its divisors is an integer number (10061660000605).

Almost surely, 2^{20123320001209} is an apocalyptic number.

It is an amenable number.

20123320001209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123320001209 is an equidigital number, since it uses as much as digits as its factorization.

20123320001209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 20123320001209 in words is "twenty trillion, one hundred twenty-three billion, three hundred twenty million, one thousand, two hundred nine".