1102112021 has 4 divisors (see below), whose sum is σ = 1128992844. Its totient is φ = 1075231200.

The previous prime is 1102112017. The next prime is 1102112047. The reversal of 1102112021 is 1202112011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1202112011 = 28279 ⋅42509.

It can be written as a sum of positive squares in 2 ways, for example, as 96334225 + 1005777796 = 9815^2 + 31714^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102112021 - 2² = 1102112017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102111993 and 1102112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102102021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13440350 + ... + 13440431.

It is an arithmetic number, because the mean of its divisors is an integer number (282248211).

Almost surely, 2^1102112021 is an apocalyptic number.

It is an amenable number.

1102112021 is a deficient number, since it is larger than the sum of its proper divisors (26880823).

1102112021 is an equidigital number, since it uses as much as digits as its factorization.

1102112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26880822.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1102112021 is about 33198.0725494719. The cubic root of 1102112021 is about 1032.9403589194.

Adding to 1102112021 its reverse (1202112011), we get a palindrome (2304224032).

The spelling of 1102112021 in words is "one billion, one hundred two million, one hundred twelve thousand, twenty-one".