19121201033213 has 2 divisors, whose sum is σ = 19121201033214. Its totient is φ = 19121201033212.

The previous prime is 19121201033183. The next prime is 19121201033251. The reversal of 19121201033213 is 31233010212191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14017857985849 + 5103343047364 = 3744043^2 + 2259058^2 .

It is an emirp because it is prime and its reverse (31233010212191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19121201033213 - 2³⁴ = 19104021164029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19121201033113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9560600516606 + 9560600516607.

It is an arithmetic number, because the mean of its divisors is an integer number (9560600516607).

Almost surely, 2^{19121201033213} is an apocalyptic number.

It is an amenable number.

19121201033213 is a deficient number, since it is larger than the sum of its proper divisors (1).

19121201033213 is an equidigital number, since it uses as much as digits as its factorization.

19121201033213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 19121201033213 in words is "nineteen trillion, one hundred twenty-one billion, two hundred one million, thirty-three thousand, two hundred thirteen".