100120221000 has 192 divisors, whose sum is σ = 341572308480. Its totient is φ = 26448950400.

The previous prime is 100120220983. The next prime is 100120221007. The reversal of 100120221000 is 122021001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (100120221007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 911017 + ... + 1014983.

It is an arithmetic number, because the mean of its divisors is an integer number (1779022440).

Almost surely, 2^100120221000 is an apocalyptic number.

100120221000 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 100120221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170786154240).

100120221000 is an abundant number, since it is smaller than the sum of its proper divisors (241452087480).

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

100120221000 is a wasteful number, since it uses less digits than its factorization.

100120221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104101 (or 104084 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100120221000 its reverse (122021001), we get a palindrome (100242242001).

The spelling of 100120221000 in words is "one hundred billion, one hundred twenty million, two hundred twenty-one thousand".