1231211320327 has 2 divisors, whose sum is σ = 1231211320328. Its totient is φ = 1231211320326.

The previous prime is 1231211320291. The next prime is 1231211320343. The reversal of 1231211320327 is 7230231121321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231211320327 - 2²⁷ = 1231077102599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231211320295 and 1231211320304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231211323327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615605660163 + 615605660164.

It is an arithmetic number, because the mean of its divisors is an integer number (615605660164).

Almost surely, 2^{1231211320327} is an apocalyptic number.

1231211320327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231211320327 is an equidigital number, since it uses as much as digits as its factorization.

1231211320327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 1231211320327 its reverse (7230231121321), we get a palindrome (8461442441648).

The spelling of 1231211320327 in words is "one trillion, two hundred thirty-one billion, two hundred eleven million, three hundred twenty thousand, three hundred twenty-seven".