1223220331 has 2 divisors, whose sum is σ = 1223220332. Its totient is φ = 1223220330.

The previous prime is 1223220311. The next prime is 1223220353. The reversal of 1223220331 is 1330223221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1330223221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223220331 - 2¹³ = 1223212139 is a prime.

It is a super-2 number, since 2×1223220331² = 2992535956343499122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1223220299 and 1223220308.

It is not a weakly prime, because it can be changed into another prime (1223220301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611610165 + 611610166.

It is an arithmetic number, because the mean of its divisors is an integer number (611610166).

Almost surely, 2^1223220331 is an apocalyptic number.

1223220331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223220331 is an equidigital number, since it uses as much as digits as its factorization.

1223220331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1223220331 is about 34974.5669165467. The cubic root of 1223220331 is about 1069.4690733703.

Adding to 1223220331 its reverse (1330223221), we get a palindrome (2553443552).

The spelling of 1223220331 in words is "one billion, two hundred twenty-three million, two hundred twenty thousand, three hundred thirty-one".