122220100020 has 96 divisors (see below), whose sum is σ = 349996147200. Its totient is φ = 31853067264.

The previous prime is 122220099961. The next prime is 122220100073. The reversal of 122220100020 is 20001022221.

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 = 122220099969 and 122220100005.

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, 1968816 + ... + 2029944.

It is an arithmetic number, because the mean of its divisors is an integer number (3645793200).

Almost surely, 2^122220100020 is an apocalyptic number.

122220100020 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 122220100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174998073600).

122220100020 is an abundant number, since it is smaller than the sum of its proper divisors (227776047180).

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

122220100020 is a wasteful number, since it uses less digits than its factorization.

122220100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61897 (or 61895 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 122220100020 its reverse (20001022221), we get a palindrome (142221122241).

The spelling of 122220100020 in words is "one hundred twenty-two billion, two hundred twenty million, one hundred thousand, twenty".