110210100021 has 24 divisors (see below), whose sum is σ = 181958853440. Its totient is φ = 62968643136.

The previous prime is 110210100019. The next prime is 110210100031. The reversal of 110210100021 is 120001012011.

It is a happy number.

It is not a de Polignac number, because 110210100021 - 2¹ = 110210100019 is a prime.

It is a super-2 number, since 2×110210100021² (a number of 23 digits) contains 22 as substring.

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 = 110210099976 and 110210100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110210100031) 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 23 ways as a sum of consecutive naturals, for example, 363945 + ... + 594033.

Almost surely, 2^110210100021 is an apocalyptic number.

It is an amenable number.

110210100021 is a deficient number, since it is larger than the sum of its proper divisors (71748753419).

110210100021 is a wasteful number, since it uses less digits than its factorization.

110210100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237705 (or 237702 counting only the distinct ones).

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

Adding to 110210100021 its reverse (120001012011), we get a palindrome (230211112032).

The spelling of 110210100021 in words is "one hundred ten billion, two hundred ten million, one hundred thousand, twenty-one".