1220123103 has 4 divisors (see below), whose sum is σ = 1626830808. Its totient is φ = 813415400.

The previous prime is 1220123083. The next prime is 1220123111. The reversal of 1220123103 is 3013210221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220123103 - 2⁶ = 1220123039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220123153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203353848 + ... + 203353853.

It is an arithmetic number, because the mean of its divisors is an integer number (406707702).

Almost surely, 2^1220123103 is an apocalyptic number.

1220123103 is a deficient number, since it is larger than the sum of its proper divisors (406707705).

1220123103 is an equidigital number, since it uses as much as digits as its factorization.

1220123103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406707704.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1220123103 is about 34930.2605630133. The cubic root of 1220123103 is about 1068.5656686165.

Adding to 1220123103 its reverse (3013210221), we get a palindrome (4233333324).

The spelling of 1220123103 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, one hundred three".