1220343112 has 8 divisors (see below), whose sum is σ = 2288143350. Its totient is φ = 610171552.

The previous prime is 1220343097. The next prime is 1220343143. The reversal of 1220343112 is 2113430221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 661209796 + 559133316 = 25714^2 + 23646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1220343112² = 2978474622011689088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220343112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76271437 + ... + 76271452.

Almost surely, 2^1220343112 is an apocalyptic number.

It is an amenable number.

1220343112 is a deficient number, since it is larger than the sum of its proper divisors (1067800238).

1220343112 is a wasteful number, since it uses less digits than its factorization.

1220343112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152542895 (or 152542891 counting only the distinct ones).

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

The square root of 1220343112 is about 34933.4096818504. The cubic root of 1220343112 is about 1068.6298916266.

Adding to 1220343112 its reverse (2113430221), we get a palindrome (3333773333).

The spelling of 1220343112 in words is "one billion, two hundred twenty million, three hundred forty-three thousand, one hundred twelve".