21161013141613 has 8 divisors (see below), whose sum is σ = 21677567382432. Its totient is φ = 20650362378096.

The previous prime is 21161013141601. The next prime is 21161013141617. The reversal of 21161013141613 is 31614131016112.

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 21161013141613 - 2⁵ = 21161013141581 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 (21161013141617) 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, 1475862070 + ... + 1475876407.

It is an arithmetic number, because the mean of its divisors is an integer number (2709695922804).

Almost surely, 2^{21161013141613} is an apocalyptic number.

It is an amenable number.

21161013141613 is a deficient number, since it is larger than the sum of its proper divisors (516554240819).

21161013141613 is a wasteful number, since it uses less digits than its factorization.

21161013141613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951738651.

The product of its (nonzero) digits is 2592, while the sum is 31.

Adding to 21161013141613 its reverse (31614131016112), we get a palindrome (52775144157725).

The spelling of 21161013141613 in words is "twenty-one trillion, one hundred sixty-one billion, thirteen million, one hundred forty-one thousand, six hundred thirteen".