123420501200 has 60 divisors (see below), whose sum is σ = 296904082860. Its totient is φ = 49303879680.

The previous prime is 123420501157. The next prime is 123420501203. The reversal of 123420501200 is 2105024321.

It can be written as a sum of positive squares in 6 ways, for example, as 2244106384 + 121176394816 = 47372^2 + 348104^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123420501203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106982 + ... + 508218.

It is an arithmetic number, because the mean of its divisors is an integer number (4948401381).

Almost surely, 2^123420501200 is an apocalyptic number.

123420501200 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 123420501200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148452041430).

123420501200 is an abundant number, since it is smaller than the sum of its proper divisors (173483581660).

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

123420501200 is a wasteful number, since it uses less digits than its factorization.

123420501200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402024 (or 402013 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 123420501200 its reverse (2105024321), we get a palindrome (125525525521).

The spelling of 123420501200 in words is "one hundred twenty-three billion, four hundred twenty million, five hundred one thousand, two hundred".