1220111017 has 2 divisors, whose sum is σ = 1220111018. Its totient is φ = 1220111016.

The previous prime is 1220110999. The next prime is 1220111033. The reversal of 1220111017 is 7101110221.

It is an a-pointer prime, because the next prime (1220111033) can be obtained adding 1220111017 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1028869776 + 191241241 = 32076^2 + 13829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220111017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220111317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610055508 + 610055509.

It is an arithmetic number, because the mean of its divisors is an integer number (610055509).

Almost surely, 2^1220111017 is an apocalyptic number.

It is an amenable number.

1220111017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220111017 is an equidigital number, since it uses as much as digits as its factorization.

1220111017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 1220111017 is about 34930.0875607262. The cubic root of 1220111017 is about 1068.5621403585.

Adding to 1220111017 its reverse (7101110221), we get a palindrome (8321221238).

The spelling of 1220111017 in words is "one billion, two hundred twenty million, one hundred eleven thousand, seventeen".