1220120113 has 2 divisors, whose sum is σ = 1220120114. Its totient is φ = 1220120112.

The previous prime is 1220120089. The next prime is 1220120117. The reversal of 1220120113 is 3110210221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676624144 + 543495969 = 26012^2 + 23313^2 .

It is an emirp because it is prime and its reverse (3110210221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220120113 - 2⁵ = 1220120081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220120093 and 1220120102.

It is not a weakly prime, because it can be changed into another prime (1220120117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610060056 + 610060057.

It is an arithmetic number, because the mean of its divisors is an integer number (610060057).

Almost surely, 2^1220120113 is an apocalyptic number.

It is an amenable number.

1220120113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220120113 is an equidigital number, since it uses as much as digits as its factorization.

1220120113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1220120113 is about 34930.2177634208. The cubic root of 1220120113 is about 1068.5647957499.

Adding to 1220120113 its reverse (3110210221), we get a palindrome (4330330334).

The spelling of 1220120113 in words is "one billion, two hundred twenty million, one hundred twenty thousand, one hundred thirteen".