123220102212 has 36 divisors (see below), whose sum is σ = 314556936876. Its totient is φ = 40666699200.

The previous prime is 123220102211. The next prime is 123220102249. The reversal of 123220102212 is 212201022321.

It can be written as a sum of positive squares in 2 ways, for example, as 67119337476 + 56100764736 = 259074^2 + 236856^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (123220102211) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 16940823 + ... + 16948094.

It is an arithmetic number, because the mean of its divisors is an integer number (8737692691).

Almost surely, 2^123220102212 is an apocalyptic number.

123220102212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123220102212 is an abundant number, since it is smaller than the sum of its proper divisors (191336834664).

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

123220102212 is a wasteful number, since it uses less digits than its factorization.

123220102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33889028 (or 33889023 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 123220102212 its reverse (212201022321), we get a palindrome (335421124533).

The spelling of 123220102212 in words is "one hundred twenty-three billion, two hundred twenty million, one hundred two thousand, two hundred twelve".