21621273216141 has 8 divisors (see below), whose sum is σ = 29113793637984. Its totient is φ = 14271467469200.

The previous prime is 21621273216121. The next prime is 21621273216149. The reversal of 21621273216141 is 14161237212612.

It is a happy number.

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 21621273216141 - 2¹⁸ = 21621272953997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21621273216141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21621273216149) 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, 35678668371 + ... + 35678668976.

It is an arithmetic number, because the mean of its divisors is an integer number (3639224204748).

Almost surely, 2^{21621273216141} is an apocalyptic number.

It is an amenable number.

21621273216141 is a deficient number, since it is larger than the sum of its proper divisors (7492520421843).

21621273216141 is a wasteful number, since it uses less digits than its factorization.

21621273216141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71357337451.

The product of its digits is 48384, while the sum is 39.

The spelling of 21621273216141 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred seventy-three million, two hundred sixteen thousand, one hundred forty-one".