100001001021111 has 6 divisors (see below), whose sum is σ = 144445890363840. Its totient is φ = 66667334014068.

The previous prime is 100001001021091. The next prime is 100001001021139. The reversal of 100001001021111 is 111120100100001.

It is not a de Polignac number, because 100001001021111 - 2⁷ = 100001001020983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11111222335679 = 100001001021111 / (1 + 0 + 0 + 0 + 0 + 1 + 0 + 0 + 1 + 0 + 2 + 1 + 1 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 100001001021093 and 100001001021102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001001021511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5555611167831 + ... + 5555611167848.

It is an arithmetic number, because the mean of its divisors is an integer number (24074315060640).

Almost surely, 2^{100001001021111} is an apocalyptic number.

100001001021111 is a deficient number, since it is larger than the sum of its proper divisors (44444889342729).

100001001021111 is a wasteful number, since it uses less digits than its factorization.

100001001021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111222335685 (or 11111222335682 counting only the distinct ones).

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

Adding to 100001001021111 its reverse (111120100100001), we get a palindrome (211121101121112).

The spelling of 100001001021111 in words is "one hundred trillion, one billion, one million, twenty-one thousand, one hundred eleven".