9901000203 has 4 divisors (see below), whose sum is σ = 13201333608. Its totient is φ = 6600666800.

The previous prime is 9901000133. The next prime is 9901000211. The reversal of 9901000203 is 3020001099.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3020001099 = 3 ⋅1006667033.

It is a cyclic number.

It is not a de Polignac number, because 9901000203 - 2¹² = 9900996107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9901000253) 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, 1650166698 + ... + 1650166703.

It is an arithmetic number, because the mean of its divisors is an integer number (3300333402).

Almost surely, 2^9901000203 is an apocalyptic number.

9901000203 is a deficient number, since it is larger than the sum of its proper divisors (3300333405).

9901000203 is a wasteful number, since it uses less digits than its factorization.

9901000203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300333404.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 9901000203 is about 99503.7697929078. The cubic root of 9901000203 is about 2147.3014785386.

The spelling of 9901000203 in words is "nine billion, nine hundred one million, two hundred three", and thus it is an aban number.