123130203220 has 12 divisors (see below), whose sum is σ = 258573426804. Its totient is φ = 49252081280.

The previous prime is 123130203211. The next prime is 123130203263. The reversal of 123130203220 is 22302031321.

It can be written as a sum of positive squares in 2 ways, for example, as 59522336784 + 63607866436 = 243972^2 + 252206^2 .

It is a super-2 number, since 2×123130203220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3078255061 + ... + 3078255100.

It is an arithmetic number, because the mean of its divisors is an integer number (21547785567).

Almost surely, 2^123130203220 is an apocalyptic number.

123130203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123130203220 is an abundant number, since it is smaller than the sum of its proper divisors (135443223584).

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

123130203220 is a wasteful number, since it uses less digits than its factorization.

123130203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6156510170 (or 6156510168 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 123130203220 its reverse (22302031321), we get a palindrome (145432234541).

The spelling of 123130203220 in words is "one hundred twenty-three billion, one hundred thirty million, two hundred three thousand, two hundred twenty".