100021110111 has 24 divisors (see below), whose sum is σ = 159383240016. Its totient is φ = 60050194560.

The previous prime is 100021110083. The next prime is 100021110131. The reversal of 100021110111 is 111011120001.

It is not a de Polignac number, because 100021110111 - 2⁷ = 100021109983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100021110093 and 100021110102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021110131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10420585 + ... + 10430178.

It is an arithmetic number, because the mean of its divisors is an integer number (6640968334).

Almost surely, 2^100021110111 is an apocalyptic number.

100021110111 is a deficient number, since it is larger than the sum of its proper divisors (59362129905).

100021110111 is a wasteful number, since it uses less digits than its factorization.

100021110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20850823 (or 20850820 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 100021110111 its reverse (111011120001), we get a palindrome (211032230112).

The spelling of 100021110111 in words is "one hundred billion, twenty-one million, one hundred ten thousand, one hundred eleven".