1000122101220 has 288 divisors, whose sum is σ = 3175248263040. Its totient is φ = 233231708160.

The previous prime is 1000122101197. The next prime is 1000122101273. The reversal of 1000122101220 is 221012210001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1000122101196 and 1000122101205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 80408842 + ... + 80421278.

It is an arithmetic number, because the mean of its divisors is an integer number (11025167580).

Almost surely, 2^{1000122101220} is an apocalyptic number.

1000122101220 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 1000122101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1587624131520).

1000122101220 is an abundant number, since it is smaller than the sum of its proper divisors (2175126161820).

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

1000122101220 is a wasteful number, since it uses less digits than its factorization.

1000122101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12623 (or 12584 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1000122101220 its reverse (221012210001), we get a palindrome (1221134311221).

The spelling of 1000122101220 in words is "one trillion, one hundred twenty-two million, one hundred one thousand, two hundred twenty".