19999484129111 has 2 divisors, whose sum is σ = 19999484129112. Its totient is φ = 19999484129110.

The previous prime is 19999484129077. The next prime is 19999484129117. The reversal of 19999484129111 is 11192148499991.

It is a strong prime.

It is an emirp because it is prime and its reverse (11192148499991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19999484129111 - 2⁴² = 15601437618007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19999484129117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9999742064555 + 9999742064556.

It is an arithmetic number, because the mean of its divisors is an integer number (9999742064556).

Almost surely, 2^{19999484129111} is an apocalyptic number.

19999484129111 is a deficient number, since it is larger than the sum of its proper divisors (1).

19999484129111 is an equidigital number, since it uses as much as digits as its factorization.

19999484129111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15116544, while the sum is 68.

The spelling of 19999484129111 in words is "nineteen trillion, nine hundred ninety-nine billion, four hundred eighty-four million, one hundred twenty-nine thousand, one hundred eleven".