123210421040 has 240 divisors, whose sum is σ = 338098455552. Its totient is φ = 40901027328.

The previous prime is 123210421027. The next prime is 123210421063. The reversal of 123210421040 is 40124012321.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127414637 + ... + 127415603.

Almost surely, 2^123210421040 is an apocalyptic number.

123210421040 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 123210421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169049227776).

123210421040 is an abundant number, since it is smaller than the sum of its proper divisors (214888034512).

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

123210421040 is a wasteful number, since it uses less digits than its factorization.

123210421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 123210421040 its reverse (40124012321), we get a palindrome (163334433361).

The spelling of 123210421040 in words is "one hundred twenty-three billion, two hundred ten million, four hundred twenty-one thousand, forty".