1220302331 has 2 divisors, whose sum is σ = 1220302332. Its totient is φ = 1220302330.

The previous prime is 1220302309. The next prime is 1220302333. The reversal of 1220302331 is 1332030221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220302331 - 2¹⁸ = 1220040187 is a prime.

It is a super-2 number, since 2×1220302331² = 2978275558088067122, which contains 22 as substring.

Together with 1220302333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1220302333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610151165 + 610151166.

It is an arithmetic number, because the mean of its divisors is an integer number (610151166).

Almost surely, 2^1220302331 is an apocalyptic number.

1220302331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220302331 is an equidigital number, since it uses as much as digits as its factorization.

1220302331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1220302331 is about 34932.8259807305. The cubic root of 1220302331 is about 1068.6179877938.

Adding to 1220302331 its reverse (1332030221), we get a palindrome (2552332552).

The spelling of 1220302331 in words is "one billion, two hundred twenty million, three hundred two thousand, three hundred thirty-one".