1219198013939 has 2 divisors, whose sum is σ = 1219198013940. Its totient is φ = 1219198013938.

The previous prime is 1219198013933. The next prime is 1219198013953. The reversal of 1219198013939 is 9393108919121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1219198013939 - 2¹⁶ = 1219197948403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1219198013933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609599006969 + 609599006970.

It is an arithmetic number, because the mean of its divisors is an integer number (609599006970).

Almost surely, 2^{1219198013939} is an apocalyptic number.

1219198013939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219198013939 is an equidigital number, since it uses as much as digits as its factorization.

1219198013939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 56.

The spelling of 1219198013939 in words is "one trillion, two hundred nineteen billion, one hundred ninety-eight million, thirteen thousand, nine hundred thirty-nine".