1012021011109 has 2 divisors, whose sum is σ = 1012021011110. Its totient is φ = 1012021011108.

The previous prime is 1012021011107. The next prime is 1012021011151. The reversal of 1012021011109 is 9011101202101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871043290209 + 140977720900 = 933297^2 + 375470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012021011109 - 2¹ = 1012021011107 is a prime.

Together with 1012021011107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012021011107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506010505554 + 506010505555.

It is an arithmetic number, because the mean of its divisors is an integer number (506010505555).

Almost surely, 2^{1012021011109} is an apocalyptic number.

It is an amenable number.

1012021011109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012021011109 is an equidigital number, since it uses as much as digits as its factorization.

1012021011109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 1012021011109 in words is "one trillion, twelve billion, twenty-one million, eleven thousand, one hundred nine".