1219198013929 has 9 divisors (see below), whose sum is σ = 1418259742077. Its totient is φ = 1045020244044.

The previous prime is 1219198013897. The next prime is 1219198013933. The reversal of 1219198013929 is 9293108919121.

It is a happy number.

The square root of 1219198013929 is 1104173.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1219198013929 - 2⁵ = 1219198013897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1219198013929.

It is not an unprimeable number, because it can be changed into a prime (1219198013939) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7650342 + ... + 7808080.

Almost surely, 2^{1219198013929} is an apocalyptic number.

1219198013929 is the 1104173-rd square number.

1219198013929 is the 552087-th centered octagonal number.

It is an amenable number.

1219198013929 is a deficient number, since it is larger than the sum of its proper divisors (199061728148).

1219198013929 is an frugal number, since it uses more digits than its factorization.

1219198013929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315492 (or 157746 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 55.

The spelling of 1219198013929 in words is "one trillion, two hundred nineteen billion, one hundred ninety-eight million, thirteen thousand, nine hundred twenty-nine".