1211320331239 has 2 divisors, whose sum is σ = 1211320331240. Its totient is φ = 1211320331238.

The previous prime is 1211320331231. The next prime is 1211320331279. The reversal of 1211320331239 is 9321330231121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211320331239 - 2³ = 1211320331231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211320331239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211320331231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605660165619 + 605660165620.

It is an arithmetic number, because the mean of its divisors is an integer number (605660165620).

Almost surely, 2^{1211320331239} is an apocalyptic number.

1211320331239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211320331239 is an equidigital number, since it uses as much as digits as its factorization.

1211320331239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 1211320331239 in words is "one trillion, two hundred eleven billion, three hundred twenty million, three hundred thirty-one thousand, two hundred thirty-nine".