101521361605 has 16 divisors (see below), whose sum is σ = 123309232704. Its totient is φ = 80228275200.

The previous prime is 101521361587. The next prime is 101521361639. The reversal of 101521361605 is 506163125101.

It is a happy number.

It is not a de Polignac number, because 101521361605 - 2⁵ = 101521361573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5967922 + ... + 5984908.

It is an arithmetic number, because the mean of its divisors is an integer number (7706827044).

Almost surely, 2^101521361605 is an apocalyptic number.

It is an amenable number.

101521361605 is a deficient number, since it is larger than the sum of its proper divisors (21787871099).

101521361605 is a wasteful number, since it uses less digits than its factorization.

101521361605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31476.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 101521361605 its reverse (506163125101), we get a palindrome (607684486706).

The spelling of 101521361605 in words is "one hundred one billion, five hundred twenty-one million, three hundred sixty-one thousand, six hundred five".