123320021220220 has 96 divisors (see below), whose sum is σ = 283739959915776. Its totient is φ = 44649216268800.

The previous prime is 123320021220199. The next prime is 123320021220271. The reversal of 123320021220220 is 22022120023321.

It is a super-2 number, since 2×123320021220220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 123320021220191 and 123320021220200.

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, 1690877155 + ... + 1690950085.

It is an arithmetic number, because the mean of its divisors is an integer number (2955624582456).

Almost surely, 2^{123320021220220} is an apocalyptic number.

123320021220220 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 123320021220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141869979957888).

123320021220220 is an abundant number, since it is smaller than the sum of its proper divisors (160419938695556).

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

123320021220220 is a wasteful number, since it uses less digits than its factorization.

123320021220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106171 (or 106169 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 123320021220220 its reverse (22022120023321), we get a palindrome (145342141243541).

The spelling of 123320021220220 in words is "one hundred twenty-three trillion, three hundred twenty billion, twenty-one million, two hundred twenty thousand, two hundred twenty".