1200122212217 has 2 divisors, whose sum is σ = 1200122212218. Its totient is φ = 1200122212216.

The previous prime is 1200122212181. The next prime is 1200122212231. The reversal of 1200122212217 is 7122122210021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184677688041 + 15444524176 = 1088429^2 + 124276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200122212217 - 2¹⁸ = 1200121950073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200122212192 and 1200122212201.

It is not a weakly prime, because it can be changed into another prime (1200122212117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600061106108 + 600061106109.

It is an arithmetic number, because the mean of its divisors is an integer number (600061106109).

Almost surely, 2^{1200122212217} is an apocalyptic number.

It is an amenable number.

1200122212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200122212217 is an equidigital number, since it uses as much as digits as its factorization.

1200122212217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 1200122212217 its reverse (7122122210021), we get a palindrome (8322244422238).

The spelling of 1200122212217 in words is "one trillion, two hundred billion, one hundred twenty-two million, two hundred twelve thousand, two hundred seventeen".