1220120342 has 16 divisors (see below), whose sum is σ = 2102150400. Its totient is φ = 520279848.

The previous prime is 1220120309. The next prime is 1220120389. The reversal of 1220120342 is 2430210221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220120342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216188 + ... + 221759.

It is an arithmetic number, because the mean of its divisors is an integer number (131384400).

Almost surely, 2^1220120342 is an apocalyptic number.

1220120342 is a deficient number, since it is larger than the sum of its proper divisors (882030058).

1220120342 is a wasteful number, since it uses less digits than its factorization.

1220120342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438155.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1220120342 is about 34930.2210413848. The cubic root of 1220120342 is about 1068.5648626016.

Adding to 1220120342 its reverse (2430210221), we get a palindrome (3650330563).

The spelling of 1220120342 in words is "one billion, two hundred twenty million, one hundred twenty thousand, three hundred forty-two".