100105511111051 has 4 divisors (see below), whose sum is σ = 100466902848192. Its totient is φ = 99744119373912.

The previous prime is 100105511110999. The next prime is 100105511111063. The reversal of 100105511111051 is 150111115501001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100105511111051 is a prime.

It is a super-2 number, since 2×100105511111051² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100105511111651) 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, 180695868155 + ... + 180695868708.

It is an arithmetic number, because the mean of its divisors is an integer number (25116725712048).

Almost surely, 2^{100105511111051} is an apocalyptic number.

100105511111051 is a deficient number, since it is larger than the sum of its proper divisors (361391737141).

100105511111051 is an equidigital number, since it uses as much as digits as its factorization.

100105511111051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361391737140.

The product of its (nonzero) digits is 125, while the sum is 23.

Adding to 100105511111051 its reverse (150111115501001), we get a palindrome (250216626612052).

The spelling of 100105511111051 in words is "one hundred trillion, one hundred five billion, five hundred eleven million, one hundred eleven thousand, fifty-one".