100111101128 has 8 divisors (see below), whose sum is σ = 187708314630. Its totient is φ = 50055550560.

The previous prime is 100111101127. The next prime is 100111101143. The reversal of 100111101128 is 821101111001.

It can be written as a sum of positive squares in only one way, i.e., 76055711524 + 24055389604 = 275782^2 + 155098^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (100111101127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256943813 + ... + 6256943828.

Almost surely, 2^100111101128 is an apocalyptic number.

It is an amenable number.

100111101128 is a deficient number, since it is larger than the sum of its proper divisors (87597213502).

100111101128 is a wasteful number, since it uses less digits than its factorization.

100111101128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12513887647 (or 12513887643 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 100111101128 its reverse (821101111001), we get a palindrome (921212212129).

The spelling of 100111101128 in words is "one hundred billion, one hundred eleven million, one hundred one thousand, one hundred twenty-eight".