111001001020101 has 12 divisors (see below), whose sum is σ = 160335038940960. Its totient is φ = 74000547489960.

The previous prime is 111001001020051. The next prime is 111001001020121. The reversal of 111001001020101 is 101020100100111.

It is not a de Polignac number, because 111001001020101 - 2⁹ = 111001001019589 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001001020121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3929241 + ... + 15409118.

It is an arithmetic number, because the mean of its divisors is an integer number (13361253245080).

Almost surely, 2^{111001001020101} is an apocalyptic number.

It is an amenable number.

111001001020101 is a deficient number, since it is larger than the sum of its proper divisors (49334037920859).

111001001020101 is a wasteful number, since it uses less digits than its factorization.

111001001020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19976136 (or 19976133 counting only the distinct ones).

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

Adding to 111001001020101 its reverse (101020100100111), we get a palindrome (212021101120212).

The spelling of 111001001020101 in words is "one hundred eleven trillion, one billion, one million, twenty thousand, one hundred one".