1421719099421 has 8 divisors (see below), whose sum is σ = 1422265428864. Its totient is φ = 1421172857520.

The previous prime is 1421719099393. The next prime is 1421719099441. The reversal of 1421719099421 is 1249909171241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421719099421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421719099421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421719099441) 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 7 ways as a sum of consecutive naturals, for example, 68794736 + ... + 68815398.

It is an arithmetic number, because the mean of its divisors is an integer number (177783178608).

Almost surely, 2^{1421719099421} is an apocalyptic number.

It is an amenable number.

1421719099421 is a deficient number, since it is larger than the sum of its proper divisors (546329443).

1421719099421 is a wasteful number, since it uses less digits than its factorization.

1421719099421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43771.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 1421719099421 in words is "one trillion, four hundred twenty-one billion, seven hundred nineteen million, ninety-nine thousand, four hundred twenty-one".