1213111327 has 2 divisors, whose sum is σ = 1213111328. Its totient is φ = 1213111326.

The previous prime is 1213111307. The next prime is 1213111351. The reversal of 1213111327 is 7231113121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213111327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213111298 and 1213111307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213111307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606555663 + 606555664.

It is an arithmetic number, because the mean of its divisors is an integer number (606555664).

Almost surely, 2^1213111327 is an apocalyptic number.

1213111327 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213111327 is an equidigital number, since it uses as much as digits as its factorization.

1213111327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 22.

The square root of 1213111327 is about 34829.7477309268. The cubic root of 1213111327 is about 1066.5147985717.

Adding to 1213111327 its reverse (7231113121), we get a palindrome (8444224448).

The spelling of 1213111327 in words is "one billion, two hundred thirteen million, one hundred eleven thousand, three hundred twenty-seven".