99101122780 has 96 divisors (see below), whose sum is σ = 228681351360. Its totient is φ = 35775559680.

The previous prime is 99101122763. The next prime is 99101122789. The reversal of 99101122780 is 8722110199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99101122789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33377136 + ... + 33380104.

It is an arithmetic number, because the mean of its divisors is an integer number (2382097410).

Almost surely, 2^99101122780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99101122780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114340675680).

99101122780 is an abundant number, since it is smaller than the sum of its proper divisors (129580228580).

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

99101122780 is a wasteful number, since it uses less digits than its factorization.

99101122780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039 (or 4037 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 99101122780 in words is "ninety-nine billion, one hundred one million, one hundred twenty-two thousand, seven hundred eighty".