1220302311 has 16 divisors (see below), whose sum is σ = 1669072608. Its totient is φ = 792588800.

The previous prime is 1220302309. The next prime is 1220302331. The reversal of 1220302311 is 1132030221.

It is a cyclic number.

It is not a de Polignac number, because 1220302311 - 2¹ = 1220302309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220302331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87085 + ... + 100121.

It is an arithmetic number, because the mean of its divisors is an integer number (104317038).

Almost surely, 2^1220302311 is an apocalyptic number.

1220302311 is a deficient number, since it is larger than the sum of its proper divisors (448770297).

1220302311 is a wasteful number, since it uses less digits than its factorization.

1220302311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13842.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1220302311 is about 34932.8256944668. The cubic root of 1220302311 is about 1068.6179819558.

Adding to 1220302311 its reverse (1132030221), we get a palindrome (2352332532).

The spelling of 1220302311 in words is "one billion, two hundred twenty million, three hundred two thousand, three hundred eleven".