100561061051 has 4 divisors (see below), whose sum is σ = 109702975704. Its totient is φ = 91419146400.

The previous prime is 100561060987. The next prime is 100561061057. The reversal of 100561061051 is 150160165001.

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

It is a cyclic number.

It is not a de Polignac number, because 100561061051 - 2⁶ = 100561060987 is a prime.

It is a super-2 number, since 2×100561061051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100561061051.

It is not an unprimeable number, because it can be changed into a prime (100561061057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4570957310 + ... + 4570957331.

It is an arithmetic number, because the mean of its divisors is an integer number (27425743926).

Almost surely, 2^100561061051 is an apocalyptic number.

100561061051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100561061051 is a deficient number, since it is larger than the sum of its proper divisors (9141914653).

100561061051 is an equidigital number, since it uses as much as digits as its factorization.

100561061051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141914652.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 100561061051 in words is "one hundred billion, five hundred sixty-one million, sixty-one thousand, fifty-one".