1020020211109 has 2 divisors, whose sum is σ = 1020020211110. Its totient is φ = 1020020211108.

The previous prime is 1020020211103. The next prime is 1020020211127. The reversal of 1020020211109 is 9011120200201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 786586288609 + 233433922500 = 886897^2 + 483150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020020211109 - 2⁹ = 1020020210597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020020211103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510010105554 + 510010105555.

It is an arithmetic number, because the mean of its divisors is an integer number (510010105555).

Almost surely, 2^{1020020211109} is an apocalyptic number.

It is an amenable number.

1020020211109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020020211109 is an equidigital number, since it uses as much as digits as its factorization.

1020020211109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 1020020211109 in words is "one trillion, twenty billion, twenty million, two hundred eleven thousand, one hundred nine".