1220115223 has 2 divisors, whose sum is σ = 1220115224. Its totient is φ = 1220115222.

The previous prime is 1220115217. The next prime is 1220115251. The reversal of 1220115223 is 3225110221.

It is a weak prime.

It is an emirp because it is prime and its reverse (3225110221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220115223 - 2²¹ = 1218018071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220115223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220115283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610057611 + 610057612.

It is an arithmetic number, because the mean of its divisors is an integer number (610057612).

Almost surely, 2^1220115223 is an apocalyptic number.

1220115223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220115223 is an equidigital number, since it uses as much as digits as its factorization.

1220115223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1220115223 is about 34930.1477666499. The cubic root of 1220115223 is about 1068.5633682159.

Adding to 1220115223 its reverse (3225110221), we get a palindrome (4445225444).

The spelling of 1220115223 in words is "one billion, two hundred twenty million, one hundred fifteen thousand, two hundred twenty-three".