110001021021 has 12 divisors (see below), whose sum is σ = 159238050972. Its totient is φ = 73173542976.

The previous prime is 110001021017. The next prime is 110001021073. The reversal of 110001021021 is 120120100011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 105550263225 + 4450757796 = 324885^2 + 66714^2 .

It is not a de Polignac number, because 110001021021 - 2² = 110001021017 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 = 110001020994 and 110001021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110001221021) 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 11 ways as a sum of consecutive naturals, for example, 13368246 + ... + 13376471.

It is an arithmetic number, because the mean of its divisors is an integer number (13269837581).

Almost surely, 2^110001021021 is an apocalyptic number.

It is an amenable number.

110001021021 is a deficient number, since it is larger than the sum of its proper divisors (49237029951).

110001021021 is a wasteful number, since it uses less digits than its factorization.

110001021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26745180 (or 26745177 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 110001021021 its reverse (120120100011), we get a palindrome (230121121032).

The spelling of 110001021021 in words is "one hundred ten billion, one million, twenty-one thousand, twenty-one".