21612105062317 has 16 divisors (see below), whose sum is σ = 27401656435200. Its totient is φ = 16555167422640.

The previous prime is 21612105062281. The next prime is 21612105062329. The reversal of 21612105062317 is 71326050121612.

It is not a de Polignac number, because 21612105062317 - 2¹¹ = 21612105060269 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 (21612105062417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2378611467 + ... + 2378620552.

It is an arithmetic number, because the mean of its divisors is an integer number (1712603527200).

Almost surely, 2^{21612105062317} is an apocalyptic number.

It is an amenable number.

21612105062317 is a deficient number, since it is larger than the sum of its proper divisors (5789551372883).

21612105062317 is a wasteful number, since it uses less digits than its factorization.

21612105062317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757232096.

The product of its (nonzero) digits is 30240, while the sum is 37.

Adding to 21612105062317 its reverse (71326050121612), we get a palindrome (92938155183929).

The spelling of 21612105062317 in words is "twenty-one trillion, six hundred twelve billion, one hundred five million, sixty-two thousand, three hundred seventeen".