100561051011 has 4 divisors (see below), whose sum is σ = 134081401352. Its totient is φ = 67040700672.

The previous prime is 100561051009. The next prime is 100561051027. The reversal of 100561051011 is 110150165001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 100561051011 - 2¹ = 100561051009 is a prime.

It is a super-2 number, since 2×100561051011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100561051051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16760175166 + ... + 16760175171.

It is an arithmetic number, because the mean of its divisors is an integer number (33520350338).

Almost surely, 2^100561051011 is an apocalyptic number.

100561051011 is a deficient number, since it is larger than the sum of its proper divisors (33520350341).

100561051011 is an equidigital number, since it uses as much as digits as its factorization.

100561051011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33520350340.

The product of its (nonzero) digits is 150, while the sum is 21.

The spelling of 100561051011 in words is "one hundred billion, five hundred sixty-one million, fifty-one thousand, eleven".