1110110021 has 4 divisors (see below), whose sum is σ = 1110232044. Its totient is φ = 1109988000.

The previous prime is 1110110011. The next prime is 1110110119. The reversal of 1110110021 is 1200110111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 558376900 + 551733121 = 23630^2 + 23489^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110110021 - 2³⁰ = 36368197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1110109990 and 1110110008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110110011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46160 + ... + 65961.

It is an arithmetic number, because the mean of its divisors is an integer number (277558011).

Almost surely, 2^1110110021 is an apocalyptic number.

It is an amenable number.

1110110021 is a deficient number, since it is larger than the sum of its proper divisors (122023).

1110110021 is an equidigital number, since it uses as much as digits as its factorization.

1110110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122022.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1110110021 is about 33318.3135977798. The cubic root of 1110110021 is about 1035.4330132107.

Adding to 1110110021 its reverse (1200110111), we get a palindrome (2310220132).

The spelling of 1110110021 in words is "one billion, one hundred ten million, one hundred ten thousand, twenty-one".