123100203212 has 24 divisors (see below), whose sum is σ = 248590707456. Its totient is φ = 52245022608.

The previous prime is 123100203143. The next prime is 123100203217. The reversal of 123100203212 is 212302001321.

It is not an unprimeable number, because it can be changed into a prime (123100203217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21339038 + ... + 21344805.

It is an arithmetic number, because the mean of its divisors is an integer number (10357946144).

Almost surely, 2^123100203212 is an apocalyptic number.

It is an amenable number.

123100203212 is an abundant number, since it is smaller than the sum of its proper divisors (125490504244).

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

123100203212 is a wasteful number, since it uses less digits than its factorization.

123100203212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42683957 (or 42683955 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 123100203212 its reverse (212302001321), we get a palindrome (335402204533).

The spelling of 123100203212 in words is "one hundred twenty-three billion, one hundred million, two hundred three thousand, two hundred twelve".