123020450120 has 16 divisors (see below), whose sum is σ = 276796012860. Its totient is φ = 49208180032.

The previous prime is 123020450117. The next prime is 123020450153. The reversal of 123020450120 is 21054020321.

It can be written as a sum of positive squares in 2 ways, for example, as 118692652324 + 4327797796 = 344518^2 + 65786^2 .

It is a super-2 number, since 2×123020450120² (a number of 23 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 123020450092 and 123020450101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1537755587 + ... + 1537755666.

Almost surely, 2^123020450120 is an apocalyptic number.

123020450120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123020450120 is an abundant number, since it is smaller than the sum of its proper divisors (153775562740).

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

123020450120 is a wasteful number, since it uses less digits than its factorization.

123020450120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3075511264 (or 3075511260 counting only the distinct ones).

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

Adding to 123020450120 its reverse (21054020321), we get a palindrome (144074470441).

The spelling of 123020450120 in words is "one hundred twenty-three billion, twenty million, four hundred fifty thousand, one hundred twenty".