1211141389 has 2 divisors, whose sum is σ = 1211141390. Its totient is φ = 1211141388.

The previous prime is 1211141381. The next prime is 1211141411. The reversal of 1211141389 is 9831411121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159947364 + 51194025 = 34058^2 + 7155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211141389 - 2³ = 1211141381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211141389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211141381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605570694 + 605570695.

It is an arithmetic number, because the mean of its divisors is an integer number (605570695).

Almost surely, 2^1211141389 is an apocalyptic number.

It is an amenable number.

1211141389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211141389 is an equidigital number, since it uses as much as digits as its factorization.

1211141389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 31.

The square root of 1211141389 is about 34801.4567080173. The cubic root of 1211141389 is about 1065.9371911573.

The spelling of 1211141389 in words is "one billion, two hundred eleven million, one hundred forty-one thousand, three hundred eighty-nine".