12149451794821 has 8 divisors (see below), whose sum is σ = 13413633526944. Its totient is φ = 10911884415120.

The previous prime is 12149451794819. The next prime is 12149451794849. The reversal of 12149451794821 is 12849715494121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12149451794821 - 2¹ = 12149451794819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12149451794891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6653587146 + ... + 6653588971.

It is an arithmetic number, because the mean of its divisors is an integer number (1676704190868).

Almost surely, 2^{12149451794821} is an apocalyptic number.

12149451794821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12149451794821 is a deficient number, since it is larger than the sum of its proper divisors (1264181732123).

12149451794821 is a wasteful number, since it uses less digits than its factorization.

12149451794821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13307176211.

The product of its digits is 5806080, while the sum is 58.

The spelling of 12149451794821 in words is "twelve trillion, one hundred forty-nine billion, four hundred fifty-one million, seven hundred ninety-four thousand, eight hundred twenty-one".