110010210021 has 10 divisors (see below), whose sum is σ = 164336239782. Its totient is φ = 73340139960.

The previous prime is 110010210001. The next prime is 110010210031. The reversal of 110010210021 is 120012010011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 82317921921 + 27692288100 = 286911^2 + 166410^2 .

It is not a de Polignac number, because 110010210021 - 2¹⁹ = 110009685733 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 = 110010209985 and 110010210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110010210001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 679075290 + ... + 679075451.

Almost surely, 2^110010210021 is an apocalyptic number.

It is an amenable number.

110010210021 is a deficient number, since it is larger than the sum of its proper divisors (54326029761).

110010210021 is an equidigital number, since it uses as much as digits as its factorization.

110010210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358150753 (or 1358150744 counting only the distinct ones).

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

Adding to 110010210021 its reverse (120012010011), we get a palindrome (230022220032).

The spelling of 110010210021 in words is "one hundred ten billion, ten million, two hundred ten thousand, twenty-one".