1220302231 has 2 divisors, whose sum is σ = 1220302232. Its totient is φ = 1220302230.

The previous prime is 1220302207. The next prime is 1220302243. The reversal of 1220302231 is 1322030221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220302231 - 2⁵ = 1220302199 is a prime.

It is a super-2 number, since 2×1220302231² = 2978275069967154722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220302201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610151115 + 610151116.

It is an arithmetic number, because the mean of its divisors is an integer number (610151116).

Almost surely, 2^1220302231 is an apocalyptic number.

1220302231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220302231 is an equidigital number, since it uses as much as digits as its factorization.

1220302231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220302231 is about 34932.8245494120. The cubic root of 1220302231 is about 1068.6179586038.

Adding to 1220302231 its reverse (1322030221), we get a palindrome (2542332452).

The spelling of 1220302231 in words is "one billion, two hundred twenty million, three hundred two thousand, two hundred thirty-one".