21616231215241 has 8 divisors (see below), whose sum is σ = 23279058623744. Its totient is φ = 19953409577040.

The previous prime is 21616231215233. The next prime is 21616231215283. The reversal of 21616231215241 is 14251213261612.

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 21616231215241 - 2³ = 21616231215233 is a prime.

It is a super-2 number, since 2×21616231215241² (a number of 27 digits) contains 22 as substring.

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 21616231215241.

It is not an unprimeable number, because it can be changed into a prime (21616231275241) 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, 9301690 + ... + 11390956.

It is an arithmetic number, because the mean of its divisors is an integer number (2909882327968).

Almost surely, 2^{21616231215241} is an apocalyptic number.

It is an amenable number.

21616231215241 is a deficient number, since it is larger than the sum of its proper divisors (1662827408503).

21616231215241 is a wasteful number, since it uses less digits than its factorization.

21616231215241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885151.

The product of its digits is 34560, while the sum is 37.

Adding to 21616231215241 its reverse (14251213261612), we get a palindrome (35867444476853).

The spelling of 21616231215241 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty-one million, two hundred fifteen thousand, two hundred forty-one".