123221121023220 has 288 divisors, whose sum is σ = 399889829598336. Its totient is φ = 28110215577600.

The previous prime is 123221121023207. The next prime is 123221121023233. The reversal of 123221121023220 is 22320121122321.

It is an interprime number because it is at equal distance from previous prime (123221121023207) and next prime (123221121023233).

It is a congruent number.

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, 1304805124 + ... + 1304899556.

It is an arithmetic number, because the mean of its divisors is an integer number (1388506352772).

Almost surely, 2^{123221121023220} is an apocalyptic number.

123221121023220 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 123221121023220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199944914799168).

123221121023220 is an abundant number, since it is smaller than the sum of its proper divisors (276668708575116).

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

123221121023220 is a wasteful number, since it uses less digits than its factorization.

123221121023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101331 (or 101312 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 123221121023220 its reverse (22320121122321), we get a palindrome (145541242145541).

The spelling of 123221121023220 in words is "one hundred twenty-three trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-three thousand, two hundred twenty".