1220120206 has 16 divisors (see below), whose sum is σ = 1843203600. Its totient is φ = 605729728.

The previous prime is 1220120201. The next prime is 1220120221. The reversal of 1220120206 is 6020210221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220120201) 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, 274530 + ... + 278938.

It is an arithmetic number, because the mean of its divisors is an integer number (115200225).

Almost surely, 2^1220120206 is an apocalyptic number.

1220120206 is a deficient number, since it is larger than the sum of its proper divisors (623083394).

1220120206 is a wasteful number, since it uses less digits than its factorization.

1220120206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1220120206 is about 34930.2190946464. The cubic root of 1220120206 is about 1068.5648228993.

Adding to 1220120206 its reverse (6020210221), we get a palindrome (7240330427).

The spelling of 1220120206 in words is "one billion, two hundred twenty million, one hundred twenty thousand, two hundred six".