123512271120 has 160 divisors (see below), whose sum is σ = 486207095040. Its totient is φ = 28231372800.

The previous prime is 123512271119. The next prime is 123512271229. The reversal of 123512271120 is 21172215321.

It is a happy number.

123512271120 is a `hidden beast` number, since 1 + 2 + 3 + 512 + 27 + 1 + 120 = 666.

It is a super-2 number, since 2×123512271120² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4069281 + ... + 4099520.

It is an arithmetic number, because the mean of its divisors is an integer number (3038794344).

Almost surely, 2^123512271120 is an apocalyptic number.

123512271120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123512271120 is an abundant number, since it is smaller than the sum of its proper divisors (362694823920).

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

123512271120 is a wasteful number, since it uses less digits than its factorization.

123512271120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168830 (or 8168818 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

Adding to 123512271120 its reverse (21172215321), we get a palindrome (144684486441).

The spelling of 123512271120 in words is "one hundred twenty-three billion, five hundred twelve million, two hundred seventy-one thousand, one hundred twenty".