1222123123 has 4 divisors (see below), whose sum is σ = 1316132608. Its totient is φ = 1128113640.

The previous prime is 1222123117. The next prime is 1222123139. The reversal of 1222123123 is 3213212221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222123123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222123123.

It is not an unprimeable number, because it can be changed into a prime (1222123153) 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, 47004723 + ... + 47004748.

It is an arithmetic number, because the mean of its divisors is an integer number (329033152).

Almost surely, 2^1222123123 is an apocalyptic number.

1222123123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1222123123 is a deficient number, since it is larger than the sum of its proper divisors (94009485).

1222123123 is an equidigital number, since it uses as much as digits as its factorization.

1222123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94009484.

The product of its digits is 288, while the sum is 19.

The square root of 1222123123 is about 34958.8775992594. The cubic root of 1222123123 is about 1069.1492124760.

Adding to 1222123123 its reverse (3213212221), we get a palindrome (4435335344).

It can be divided in two parts, 12221 and 23123, that added together give a square (35344 = 188²).

The spelling of 1222123123 in words is "one billion, two hundred twenty-two million, one hundred twenty-three thousand, one hundred twenty-three".