123130311220 has 48 divisors (see below), whose sum is σ = 295536890880. Its totient is φ = 42212657664.

The previous prime is 123130311181. The next prime is 123130311221. The reversal of 123130311220 is 22113031321.

It is a super-2 number, since 2×123130311220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123130311221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2162476 + ... + 2218684.

It is an arithmetic number, because the mean of its divisors is an integer number (6157018560).

Almost surely, 2^123130311220 is an apocalyptic number.

123130311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123130311220 is an abundant number, since it is smaller than the sum of its proper divisors (172406579660).

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

123130311220 is a wasteful number, since it uses less digits than its factorization.

123130311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71872 (or 71870 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123130311220 its reverse (22113031321), we get a palindrome (145243342541).

The spelling of 123130311220 in words is "one hundred twenty-three billion, one hundred thirty million, three hundred eleven thousand, two hundred twenty".