12899197686021 has 4 divisors (see below), whose sum is σ = 17198930248032. Its totient is φ = 8599465124012.

The previous prime is 12899197686017. The next prime is 12899197686031. The reversal of 12899197686021 is 12068679199821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12899197686021 - 2² = 12899197686017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12899197686031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2149866281001 + ... + 2149866281006.

It is an arithmetic number, because the mean of its divisors is an integer number (4299732562008).

Almost surely, 2^{12899197686021} is an apocalyptic number.

It is an amenable number.

12899197686021 is a deficient number, since it is larger than the sum of its proper divisors (4299732562011).

12899197686021 is an equidigital number, since it uses as much as digits as its factorization.

12899197686021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299732562010.

The product of its (nonzero) digits is 47029248, while the sum is 69.

The spelling of 12899197686021 in words is "twelve trillion, eight hundred ninety-nine billion, one hundred ninety-seven million, six hundred eighty-six thousand, twenty-one".