100045212500 has 288 divisors, whose sum is σ = 248046624000. Its totient is φ = 35078400000.

The previous prime is 100045212493. The next prime is 100045212539. The reversal of 100045212500 is 5212540001.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 286662326 + ... + 286662674.

It is an arithmetic number, because the mean of its divisors is an integer number (861273000).

Almost surely, 2^100045212500 is an apocalyptic number.

100045212500 is a gapful number since it is divisible by the number (10) 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 100045212500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124023312000).

100045212500 is an abundant number, since it is smaller than the sum of its proper divisors (148001411500).

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

100045212500 is a wasteful number, since it uses less digits than its factorization.

100045212500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 100045212500 its reverse (5212540001), we get a palindrome (105257752501).

The spelling of 100045212500 in words is "one hundred billion, forty-five million, two hundred twelve thousand, five hundred".