1220320333231 has 2 divisors, whose sum is σ = 1220320333232. Its totient is φ = 1220320333230.

The previous prime is 1220320333213. The next prime is 1220320333241. The reversal of 1220320333231 is 1323330230221.

Together with previous prime (1220320333213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220320333231 - 2²¹ = 1220318236079 is a prime.

It is a super-2 number, since 2×1220320333231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220320333196 and 1220320333205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220320333241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610160166615 + 610160166616.

It is an arithmetic number, because the mean of its divisors is an integer number (610160166616).

Almost surely, 2^{1220320333231} is an apocalyptic number.

1220320333231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220320333231 is an equidigital number, since it uses as much as digits as its factorization.

1220320333231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 1220320333231 its reverse (1323330230221), we get a palindrome (2543650563452).

It can be divided in two parts, 1220320 and 333231, that added together give a palindrome (1553551).

The spelling of 1220320333231 in words is "one trillion, two hundred twenty billion, three hundred twenty million, three hundred thirty-three thousand, two hundred thirty-one".