21214242635161 has 8 divisors (see below), whose sum is σ = 22254863572800. Its totient is φ = 20194228052880.

The previous prime is 21214242635147. The next prime is 21214242635167. The reversal of 21214242635161 is 16153624241212.

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 21214242635161 - 2¹⁵ = 21214242602393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214242635167) 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, 5151586731 + ... + 5151590848.

It is an arithmetic number, because the mean of its divisors is an integer number (2781857946600).

Almost surely, 2^{21214242635161} is an apocalyptic number.

It is an amenable number.

21214242635161 is a deficient number, since it is larger than the sum of its proper divisors (1040620937639).

21214242635161 is a wasteful number, since it uses less digits than its factorization.

21214242635161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10303177679.

The product of its digits is 138240, while the sum is 40.

Adding to 21214242635161 its reverse (16153624241212), we get a palindrome (37367866876373).

The spelling of 21214242635161 in words is "twenty-one trillion, two hundred fourteen billion, two hundred forty-two million, six hundred thirty-five thousand, one hundred sixty-one".