1111106021 has 2 divisors, whose sum is σ = 1111106022. Its totient is φ = 1111106020.

The previous prime is 1111105979. The next prime is 1111106069. The reversal of 1111106021 is 1206011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 958583521 + 152522500 = 30961^2 + 12350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111106021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111105987 and 1111106005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111106071) 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, 555553010 + 555553011.

It is an arithmetic number, because the mean of its divisors is an integer number (555553011).

Almost surely, 2^1111106021 is an apocalyptic number.

It is an amenable number.

1111106021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111106021 is an equidigital number, since it uses as much as digits as its factorization.

1111106021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 14.

The square root of 1111106021 is about 33333.2569815792. The cubic root of 1111106021 is about 1035.7425870330.

Adding to 1111106021 its reverse (1206011111), we get a palindrome (2317117132).

The spelling of 1111106021 in words is "one billion, one hundred eleven million, one hundred six thousand, twenty-one".