1020000122109 has 12 divisors (see below), whose sum is σ = 1473778265596. Its totient is φ = 679794809472.

The previous prime is 1020000122083. The next prime is 1020000122123. The reversal of 1020000122109 is 9012210000201.

It can be written as a sum of positive squares in 2 ways, for example, as 853166268900 + 166833853209 = 923670^2 + 408453^2 .

It is not a de Polignac number, because 1020000122109 - 2⁷ = 1020000121981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020000122091 and 1020000122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020000122189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17074522 + ... + 17134155.

Almost surely, 2^{1020000122109} is an apocalyptic number.

It is an amenable number.

1020000122109 is a deficient number, since it is larger than the sum of its proper divisors (453778143487).

1020000122109 is a wasteful number, since it uses less digits than its factorization.

1020000122109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34211996 (or 34211993 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 1020000122109 in words is "one trillion, twenty billion, one hundred twenty-two thousand, one hundred nine".