1220220123 has 16 divisors (see below), whose sum is σ = 1656892800. Its totient is φ = 798553280.

The previous prime is 1220220083. The next prime is 1220220137. The reversal of 1220220123 is 3210220221.

It is a happy number.

1220220123 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1220220123 - 2⁸ = 1220219867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220220193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130168 + ... + 139226.

It is an arithmetic number, because the mean of its divisors is an integer number (103555800).

Almost surely, 2^1220220123 is an apocalyptic number.

1220220123 is a deficient number, since it is larger than the sum of its proper divisors (436672677).

1220220123 is an equidigital number, since it uses as much as digits as its factorization.

1220220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9882.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1220220123 is about 34931.6493026024. The cubic root of 1220220123 is about 1068.5939907568.

Adding to 1220220123 its reverse (3210220221), we get a palindrome (4430440344).

The spelling of 1220220123 in words is "one billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-three".