1000021102109 has 4 divisors (see below), whose sum is σ = 1000023882204. Its totient is φ = 1000018322016.

The previous prime is 1000021101979. The next prime is 1000021102127. The reversal of 1000021102109 is 9012011200001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 966377472025 + 33643630084 = 983045^2 + 183422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000021102109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021102139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753242 + ... + 1602315.

It is an arithmetic number, because the mean of its divisors is an integer number (250005970551).

Almost surely, 2^{1000021102109} is an apocalyptic number.

It is an amenable number.

1000021102109 is a deficient number, since it is larger than the sum of its proper divisors (2780095).

1000021102109 is an equidigital number, since it uses as much as digits as its factorization.

1000021102109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780094.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 1000021102109 in words is "one trillion, twenty-one million, one hundred two thousand, one hundred nine".