1110220021 has 4 divisors (see below), whose sum is σ = 1148503500. Its totient is φ = 1071936544.

The previous prime is 1110219997. The next prime is 1110220049. The reversal of 1110220021 is 1200220111.

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 870899121 + 239320900 = 29511^2 + 15470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110220021 - 2⁷ = 1110219893 is a prime.

It is a super-3 number, since 3×1110220021³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110220421) 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, 19141696 + ... + 19141753.

It is an arithmetic number, because the mean of its divisors is an integer number (287125875).

Almost surely, 2^1110220021 is an apocalyptic number.

It is an amenable number.

1110220021 is a deficient number, since it is larger than the sum of its proper divisors (38283479).

1110220021 is an equidigital number, since it uses as much as digits as its factorization.

1110220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38283478.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1110220021 is about 33319.9643007012. The cubic root of 1110220021 is about 1035.4672121842.

Adding to 1110220021 its reverse (1200220111), we get a palindrome (2310440132).

The spelling of 1110220021 in words is "one billion, one hundred ten million, two hundred twenty thousand, twenty-one".