1020202109999 has 4 divisors (see below), whose sum is σ = 1020257028336. Its totient is φ = 1020147191664.

The previous prime is 1020202109977. The next prime is 1020202110001. The reversal of 1020202109999 is 9999012020201.

It is a happy number.

1020202109999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 1020202109999 - 2⁸ = 1020202109743 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 (1020202109699) 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, 27431294 + ... + 27468459.

It is an arithmetic number, because the mean of its divisors is an integer number (255064257084).

Almost surely, 2^{1020202109999} is an apocalyptic number.

1020202109999 is a deficient number, since it is larger than the sum of its proper divisors (54918337).

1020202109999 is an equidigital number, since it uses as much as digits as its factorization.

1020202109999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54918336.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 1020202109999 in words is "one trillion, twenty billion, two hundred two million, one hundred nine thousand, nine hundred ninety-nine".