12819899998521 has 24 divisors (see below), whose sum is σ = 23086919479104. Its totient is φ = 6659688310560.

The previous prime is 12819899998483. The next prime is 12819899998589. The reversal of 12819899998521 is 12589999891821.

12819899998521 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 9 + 89 + 9 + 9 + 9 + 8 + 521 = 666.

It is not a de Polignac number, because 12819899998521 - 2⁶ = 12819899998457 is a prime.

It is a super-3 number, since 3×12819899998521³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12819899998021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9249566406 + ... + 9249567791.

It is an arithmetic number, because the mean of its divisors is an integer number (961954978296).

Almost surely, 2^{12819899998521} is an apocalyptic number.

12819899998521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12819899998521 is a deficient number, since it is larger than the sum of its proper divisors (10267019480583).

12819899998521 is a wasteful number, since it uses less digits than its factorization.

12819899998521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18499134221 (or 18499134218 counting only the distinct ones).

The product of its digits is 604661760, while the sum is 81.

The spelling of 12819899998521 in words is "twelve trillion, eight hundred nineteen billion, eight hundred ninety-nine million, nine hundred ninety-eight thousand, five hundred twenty-one".