1021112011109 has 2 divisors, whose sum is σ = 1021112011110. Its totient is φ = 1021112011108.

The previous prime is 1021112011099. The next prime is 1021112011121. The reversal of 1021112011109 is 9011102111201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 702039542884 + 319072468225 = 837878^2 + 564865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021112011109 - 2¹⁶ = 1021111945573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021112011169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510556005554 + 510556005555.

It is an arithmetic number, because the mean of its divisors is an integer number (510556005555).

Almost surely, 2^{1021112011109} is an apocalyptic number.

It is an amenable number.

1021112011109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021112011109 is an equidigital number, since it uses as much as digits as its factorization.

1021112011109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 1021112011109 in words is "one trillion, twenty-one billion, one hundred twelve million, eleven thousand, one hundred nine".