100561010051 has 4 divisors (see below), whose sum is σ = 100562807400. Its totient is φ = 100559212704.

The previous prime is 100561010029. The next prime is 100561010057. The reversal of 100561010051 is 150010165001.

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 100561010051 - 2⁶ = 100561009987 is a prime.

It is a super-2 number, since 2×100561010051² (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 (100561010057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811961 + ... + 927578.

It is an arithmetic number, because the mean of its divisors is an integer number (25140701850).

Almost surely, 2^100561010051 is an apocalyptic number.

100561010051 is a deficient number, since it is larger than the sum of its proper divisors (1797349).

100561010051 is an equidigital number, since it uses as much as digits as its factorization.

100561010051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797348.

The product of its (nonzero) digits is 150, while the sum is 20.

Adding to 100561010051 its reverse (150010165001), we get a palindrome (250571175052).

The spelling of 100561010051 in words is "one hundred billion, five hundred sixty-one million, ten thousand, fifty-one".