100561010110551 has 24 divisors (see below), whose sum is σ = 150657633251424. Its totient is φ = 64582933953600.

The previous prime is 100561010110541. The next prime is 100561010110571. The reversal of 100561010110551 is 155011010165001.

100561010110551 is a `hidden beast` number, since 1 + 0 + 0 + 5 + 6 + 1 + 0 + 101 + 1 + 0 + 551 = 666.

It is not a de Polignac number, because 100561010110551 - 2³⁴ = 100543830241367 is a prime.

It is a super-2 number, since 2×100561010110551² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100561010110541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1494941691 + ... + 1495008956.

It is an arithmetic number, because the mean of its divisors is an integer number (6277401385476).

Almost surely, 2^{100561010110551} is an apocalyptic number.

100561010110551 is a deficient number, since it is larger than the sum of its proper divisors (50096623140873).

100561010110551 is a wasteful number, since it uses less digits than its factorization.

100561010110551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989950791 (or 2989950788 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

Adding to 100561010110551 its reverse (155011010165001), we get a palindrome (255572020275552).

The spelling of 100561010110551 in words is "one hundred trillion, five hundred sixty-one billion, ten million, one hundred ten thousand, five hundred fifty-one".