123601271220 has 240 divisors, whose sum is σ = 446373607680. Its totient is φ = 28045149696.

The previous prime is 123601271161. The next prime is 123601271249. The reversal of 123601271220 is 22172106321.

123601271220 is a `hidden beast` number, since 1 + 2 + 3 + 601 + 27 + 12 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1513801 + ... + 1593359.

It is an arithmetic number, because the mean of its divisors is an integer number (1859890032).

Almost surely, 2^123601271220 is an apocalyptic number.

123601271220 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 123601271220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223186803840).

123601271220 is an abundant number, since it is smaller than the sum of its proper divisors (322772336460).

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

123601271220 is a wasteful number, since it uses less digits than its factorization.

123601271220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79724 (or 79713 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 123601271220 its reverse (22172106321), we get a palindrome (145773377541).

The spelling of 123601271220 in words is "one hundred twenty-three billion, six hundred one million, two hundred seventy-one thousand, two hundred twenty".