9121293900 has 288 divisors, whose sum is σ = 32685408000. Its totient is φ = 2168570880.

The previous prime is 9121293899. The next prime is 9121293911. The reversal of 9121293900 is 93921219.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 866871 + ... + 877329.

It is an arithmetic number, because the mean of its divisors is an integer number (113491000).

Almost surely, 2^9121293900 is an apocalyptic number.

9121293900 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9121293900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16342704000).

9121293900 is an abundant number, since it is smaller than the sum of its proper divisors (23564114100).

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

9121293900 is a wasteful number, since it uses less digits than its factorization.

9121293900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10518 (or 10505 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 9121293900 is about 95505.4652886420. The cubic root of 9121293900 is about 2089.3866548771.

The spelling of 9121293900 in words is "nine billion, one hundred twenty-one million, two hundred ninety-three thousand, nine hundred".