110111001021 has 128 divisors (see below), whose sum is σ = 200953405440. Its totient is φ = 58231540224.

The previous prime is 110111000971. The next prime is 110111001029. The reversal of 110111001021 is 120100111011.

It is not a de Polignac number, because 110111001021 - 2⁶ = 110111000957 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 = 110111000994 and 110111001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110111001029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16815270 + ... + 16821816.

It is an arithmetic number, because the mean of its divisors is an integer number (1569948480).

Almost surely, 2^110111001021 is an apocalyptic number.

It is an amenable number.

110111001021 is a deficient number, since it is larger than the sum of its proper divisors (90842404419).

110111001021 is a wasteful number, since it uses less digits than its factorization.

110111001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6712 (or 6706 counting only the distinct ones).

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

Adding to 110111001021 its reverse (120100111011), we get a palindrome (230211112032).

The spelling of 110111001021 in words is "one hundred ten billion, one hundred eleven million, one thousand, twenty-one".