1220123206 has 16 divisors (see below), whose sum is σ = 1900357200. Its totient is φ = 586827808.

The previous prime is 1220123183. The next prime is 1220123207. The reversal of 1220123206 is 6023210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220123207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23500 + ... + 54703.

It is an arithmetic number, because the mean of its divisors is an integer number (118772325).

Almost surely, 2^1220123206 is an apocalyptic number.

1220123206 is a deficient number, since it is larger than the sum of its proper divisors (680233994).

1220123206 is a wasteful number, since it uses less digits than its factorization.

1220123206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78503.

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

The square root of 1220123206 is about 34930.2620373796. The cubic root of 1220123206 is about 1068.5656986851.

Adding to 1220123206 its reverse (6023210221), we get a palindrome (7243333427).

The spelling of 1220123206 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, two hundred six".