1211223132331 has 2 divisors, whose sum is σ = 1211223132332. Its totient is φ = 1211223132330.

The previous prime is 1211223132313. The next prime is 1211223132349. The reversal of 1211223132331 is 1332313221121.

Together with previous prime (1211223132313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1211223132313) and next prime (1211223132349).

It is a cyclic number.

It is not a de Polignac number, because 1211223132331 - 2¹¹ = 1211223130283 is a prime.

It is a super-2 number, since 2×1211223132331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211223132296 and 1211223132305.

It is not a weakly prime, because it can be changed into another prime (1211223132311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611566165 + 605611566166.

It is an arithmetic number, because the mean of its divisors is an integer number (605611566166).

Almost surely, 2^{1211223132331} is an apocalyptic number.

1211223132331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211223132331 is an equidigital number, since it uses as much as digits as its factorization.

1211223132331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

Adding to 1211223132331 its reverse (1332313221121), we get a palindrome (2543536353452).

The spelling of 1211223132331 in words is "one trillion, two hundred eleven billion, two hundred twenty-three million, one hundred thirty-two thousand, three hundred thirty-one".