1101112021 has 2 divisors, whose sum is σ = 1101112022. Its totient is φ = 1101112020.

The previous prime is 1101112013. The next prime is 1101112027. The reversal of 1101112021 is 1202111011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 832611025 + 268500996 = 28855^2 + 16386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101112021 - 2³ = 1101112013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1101111989 and 1101112007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101112027) 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 as a sum of consecutive naturals, namely, 550556010 + 550556011.

It is an arithmetic number, because the mean of its divisors is an integer number (550556011).

Almost surely, 2^1101112021 is an apocalyptic number.

It is an amenable number.

1101112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101112021 is an equidigital number, since it uses as much as digits as its factorization.

1101112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1101112021 is about 33183.0080161519. The cubic root of 1101112021 is about 1032.6278519905.

Adding to 1101112021 its reverse (1202111011), we get a palindrome (2303223032).

It can be divided in two parts, 11011 and 12021, that multiplied together give a palindrome (132363231).

The spelling of 1101112021 in words is "one billion, one hundred one million, one hundred twelve thousand, twenty-one".