123000021003220 has 96 divisors (see below), whose sum is σ = 272951656427520. Its totient is φ = 46463570524800.

The previous prime is 123000021003191. The next prime is 123000021003229. The reversal of 123000021003220 is 22300120000321.

It is a super-2 number, since 2×123000021003220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123000021003194 and 123000021003203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123000021003229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2000522599 + ... + 2000584081.

It is an arithmetic number, because the mean of its divisors is an integer number (2843246421120).

Almost surely, 2^{123000021003220} is an apocalyptic number.

123000021003220 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 123000021003220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136475828213760).

123000021003220 is an abundant number, since it is smaller than the sum of its proper divisors (149951635424300).

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

123000021003220 is a wasteful number, since it uses less digits than its factorization.

123000021003220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116645 (or 116643 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 123000021003220 its reverse (22300120000321), we get a palindrome (145300141003541).

The spelling of 123000021003220 in words is "one hundred twenty-three trillion, twenty-one million, three thousand, two hundred twenty".