122120020000 has 120 divisors (see below), whose sum is σ = 327746300112. Its totient is φ = 44407200000.

The previous prime is 122120019991. The next prime is 122120020003. The reversal of 122120020000 is 20021221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (122120020003) 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 19 ways as a sum of consecutive naturals, for example, 57546 + ... + 497545.

Almost surely, 2^122120020000 is an apocalyptic number.

122120020000 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 122120020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163873150056).

122120020000 is an abundant number, since it is smaller than the sum of its proper divisors (205626280112).

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

122120020000 is an equidigital number, since it uses as much as digits as its factorization.

122120020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555132 (or 555109 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 122120020000 its reverse (20021221), we get a palindrome (122140041221).

The spelling of 122120020000 in words is "one hundred twenty-two billion, one hundred twenty million, twenty thousand".