9999990203101 has 4 divisors (see below), whose sum is σ = 10001950606204. Its totient is φ = 9998029800000.

The previous prime is 9999990203069. The next prime is 9999990203111. The reversal of 9999990203101 is 1013020999999.

9999990203101 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 can be written as a sum of positive squares in 2 ways, for example, as 3708667124100 + 6291323079001 = 1925790^2 + 2508251^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999990203101 - 2⁵ = 9999990203069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9999990203101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999990203111) 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, 980193900 + ... + 980204101.

It is an arithmetic number, because the mean of its divisors is an integer number (2500487651551).

Almost surely, 2^{9999990203101} is an apocalyptic number.

It is an amenable number.

9999990203101 is a deficient number, since it is larger than the sum of its proper divisors (1960403103).

9999990203101 is a wasteful number, since it uses less digits than its factorization.

9999990203101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960403102.

The product of its (nonzero) digits is 3188646, while the sum is 61.

The spelling of 9999990203101 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety million, two hundred three thousand, one hundred one".