1251121535219 has 2 divisors, whose sum is σ = 1251121535220. Its totient is φ = 1251121535218.

The previous prime is 1251121535179. The next prime is 1251121535267. The reversal of 1251121535219 is 9125351211521.

It is a weak prime.

It is an emirp because it is prime and its reverse (9125351211521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1251121535219 - 2³² = 1246826567923 is a prime.

It is a super-2 number, since 2×1251121535219² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1251121537219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625560767609 + 625560767610.

It is an arithmetic number, because the mean of its divisors is an integer number (625560767610).

Almost surely, 2^{1251121535219} is an apocalyptic number.

1251121535219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251121535219 is an equidigital number, since it uses as much as digits as its factorization.

1251121535219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 38.

The spelling of 1251121535219 in words is "one trillion, two hundred fifty-one billion, one hundred twenty-one million, five hundred thirty-five thousand, two hundred nineteen".