100560121566 has 16 divisors (see below), whose sum is σ = 201125389824. Its totient is φ = 33519182744.

The previous prime is 100560121561. The next prime is 100560121591. The reversal of 100560121566 is 665121065001.

It is a super-2 number, since 2×100560121566² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100560121561) 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, 68221 + ... + 453623.

It is an arithmetic number, because the mean of its divisors is an integer number (12570336864).

Almost surely, 2^100560121566 is an apocalyptic number.

100560121566 is an abundant number, since it is smaller than the sum of its proper divisors (100565268258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100560121566 is a wasteful number, since it uses less digits than its factorization.

100560121566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428895.

The product of its (nonzero) digits is 10800, while the sum is 33.

Adding to 100560121566 its reverse (665121065001), we get a palindrome (765681186567).

The spelling of 100560121566 in words is "one hundred billion, five hundred sixty million, one hundred twenty-one thousand, five hundred sixty-six".