100511105551 has 4 divisors (see below), whose sum is σ = 100656563704. Its totient is φ = 100365647400.

The previous prime is 100511105549. The next prime is 100511105557. The reversal of 100511105551 is 155501115001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155501115001 = 1847 ⋅84191183.

It is a cyclic number.

It is not a de Polignac number, because 100511105551 - 2¹ = 100511105549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100511105557) 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, 72728040 + ... + 72729421.

It is an arithmetic number, because the mean of its divisors is an integer number (25164140926).

Almost surely, 2^100511105551 is an apocalyptic number.

100511105551 is a deficient number, since it is larger than the sum of its proper divisors (145458153).

100511105551 is an equidigital number, since it uses as much as digits as its factorization.

100511105551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145458152.

The product of its (nonzero) digits is 625, while the sum is 25.

The spelling of 100511105551 in words is "one hundred billion, five hundred eleven million, one hundred five thousand, five hundred fifty-one".