123221030202 has 96 divisors (see below), whose sum is σ = 277000289280. Its totient is φ = 39546144000.

The previous prime is 123221030197. The next prime is 123221030213. The reversal of 123221030202 is 202030122321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161919502 + ... + 161920262.

It is an arithmetic number, because the mean of its divisors is an integer number (2885419680).

Almost surely, 2^123221030202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123221030202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138500144640).

123221030202 is an abundant number, since it is smaller than the sum of its proper divisors (153779259078).

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

123221030202 is a wasteful number, since it uses less digits than its factorization.

123221030202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900 (or 1897 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 123221030202 its reverse (202030122321), we get a palindrome (325251152523).

The spelling of 123221030202 in words is "one hundred twenty-three billion, two hundred twenty-one million, thirty thousand, two hundred two".