1380121499 has 2 divisors, whose sum is σ = 1380121500. Its totient is φ = 1380121498.

The previous prime is 1380121403. The next prime is 1380121511. The reversal of 1380121499 is 9941210831.

It is a strong prime.

It is an emirp because it is prime and its reverse (9941210831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1380121499 - 2⁸ = 1380121243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1380021499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690060749 + 690060750.

It is an arithmetic number, because the mean of its divisors is an integer number (690060750).

Almost surely, 2^1380121499 is an apocalyptic number.

1380121499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380121499 is an equidigital number, since it uses as much as digits as its factorization.

1380121499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1380121499 is about 37149.9865275884. The cubic root of 1380121499 is about 1113.3689542927.

The spelling of 1380121499 in words is "one billion, three hundred eighty million, one hundred twenty-one thousand, four hundred ninety-nine".