123200020420 has 48 divisors (see below), whose sum is σ = 262451145600. Its totient is φ = 48573955584.

The previous prime is 123200020403. The next prime is 123200020451. The reversal of 123200020420 is 24020002321.

It is a junction number, because it is equal to n+sod(n) for n = 123200020394 and 123200020403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281212 + ... + 570508.

It is an arithmetic number, because the mean of its divisors is an integer number (5467732200).

Almost surely, 2^123200020420 is an apocalyptic number.

123200020420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123200020420 is an abundant number, since it is smaller than the sum of its proper divisors (139251125180).

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

123200020420 is a wasteful number, since it uses less digits than its factorization.

123200020420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289612 (or 289610 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 123200020420 its reverse (24020002321), we get a palindrome (147220022741).

The spelling of 123200020420 in words is "one hundred twenty-three billion, two hundred million, twenty thousand, four hundred twenty".