1200321100073 has 2 divisors, whose sum is σ = 1200321100074. Its totient is φ = 1200321100072.

The previous prime is 1200321100051. The next prime is 1200321100207. The reversal of 1200321100073 is 3700011230021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1067932094464 + 132389005609 = 1033408^2 + 363853^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200321100073 - 2⁶ = 1200321100009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1200321100373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600160550036 + 600160550037.

It is an arithmetic number, because the mean of its divisors is an integer number (600160550037).

Almost surely, 2^{1200321100073} is an apocalyptic number.

It is an amenable number.

1200321100073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200321100073 is an equidigital number, since it uses as much as digits as its factorization.

1200321100073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 1200321100073 its reverse (3700011230021), we get a palindrome (4900332330094).

The spelling of 1200321100073 in words is "one trillion, two hundred billion, three hundred twenty-one million, one hundred thousand, seventy-three".