100001222000 has 160 divisors (see below), whose sum is σ = 253166921280. Its totient is φ = 38154009600.

The previous prime is 100001221997. The next prime is 100001222021. The reversal of 100001222000 is 222100001.

100001222000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4803614 + ... + 4824386.

It is an arithmetic number, because the mean of its divisors is an integer number (1582293258).

Almost surely, 2^100001222000 is an apocalyptic number.

100001222000 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 100001222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126583460640).

100001222000 is an abundant number, since it is smaller than the sum of its proper divisors (153165699280).

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

100001222000 is a wasteful number, since it uses less digits than its factorization.

100001222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20908 (or 20892 counting only the distinct ones).

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

Adding to 100001222000 its reverse (222100001), we get a palindrome (100223322001).

The spelling of 100001222000 in words is "one hundred billion, one million, two hundred twenty-two thousand".