1220202243 has 24 divisors (see below), whose sum is σ = 1949399088. Its totient is φ = 730596672.

The previous prime is 1220202209. The next prime is 1220202259. The reversal of 1220202243 is 3422020221.

1220202243 is a `hidden beast` number, since 1 + 220 + 202 + 243 = 666.

It is not a de Polignac number, because 1220202243 - 2¹⁴ = 1220185859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220202283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136605 + ... + 145262.

It is an arithmetic number, because the mean of its divisors is an integer number (81224962).

Almost surely, 2^1220202243 is an apocalyptic number.

1220202243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1220202243 is a deficient number, since it is larger than the sum of its proper divisors (729196845).

1220202243 is a wasteful number, since it uses less digits than its factorization.

1220202243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281923 (or 281920 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1220202243 is about 34931.3933732967. The cubic root of 1220202243 is about 1068.5887713287.

Adding to 1220202243 its reverse (3422020221), we get a palindrome (4642222464).

The spelling of 1220202243 in words is "one billion, two hundred twenty million, two hundred two thousand, two hundred forty-three".