9901001100 has 72 divisors (see below), whose sum is σ = 28662071760. Its totient is φ = 2638868480.

The previous prime is 9901001087. The next prime is 9901001113. The reversal of 9901001100 is 11001099.

It is an interprime number because it is at equal distance from previous prime (9901001087) and next prime (9901001113).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 638236 + ... + 653564.

It is an arithmetic number, because the mean of its divisors is an integer number (398084330).

Almost surely, 2^9901001100 is an apocalyptic number.

It is an amenable number.

9901001100 is an abundant number, since it is smaller than the sum of its proper divisors (18761070660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9901001100 is a wasteful number, since it uses less digits than its factorization.

9901001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17499 (or 17492 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 9901001100 is about 99503.7743002747. The cubic root of 9901001100 is about 2147.3015433849.

Adding to 9901001100 its reverse (11001099), we get a palindrome (9912002199).

The spelling of 9901001100 in words is "nine billion, nine hundred one million, one thousand, one hundred".