1220120117 has 2 divisors, whose sum is σ = 1220120118. Its totient is φ = 1220120116.

The previous prime is 1220120113. The next prime is 1220120129. The reversal of 1220120117 is 7110210221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995150116 + 224970001 = 31546^2 + 14999^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220120117 - 2² = 1220120113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220120095 and 1220120104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220120113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610060058 + 610060059.

It is an arithmetic number, because the mean of its divisors is an integer number (610060059).

Almost surely, 2^1220120117 is an apocalyptic number.

It is an amenable number.

1220120117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220120117 is an equidigital number, since it uses as much as digits as its factorization.

1220120117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 1220120117 is about 34930.2178206778. The cubic root of 1220120117 is about 1068.5647969176.

Adding to 1220120117 its reverse (7110210221), we get a palindrome (8330330338).

The spelling of 1220120117 in words is "one billion, two hundred twenty million, one hundred twenty thousand, one hundred seventeen".