1200223123217 has 2 divisors, whose sum is σ = 1200223123218. Its totient is φ = 1200223123216.

The previous prime is 1200223123207. The next prime is 1200223123237. The reversal of 1200223123217 is 7123213220021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762619704961 + 437603418256 = 873281^2 + 661516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200223123217 - 2²² = 1200218928913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200223123207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600111561608 + 600111561609.

It is an arithmetic number, because the mean of its divisors is an integer number (600111561609).

Almost surely, 2^{1200223123217} is an apocalyptic number.

It is an amenable number.

1200223123217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200223123217 is an equidigital number, since it uses as much as digits as its factorization.

1200223123217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 1200223123217 its reverse (7123213220021), we get a palindrome (8323436343238).

The spelling of 1200223123217 in words is "one trillion, two hundred billion, two hundred twenty-three million, one hundred twenty-three thousand, two hundred seventeen".