123021420212 has 6 divisors (see below), whose sum is σ = 215287485378. Its totient is φ = 61510710104.

The previous prime is 123021420199. The next prime is 123021420251. The reversal of 123021420212 is 212024120321.

It can be written as a sum of positive squares in only one way, i.e., 117878235556 + 5143184656 = 343334^2 + 71716^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15377677523 + ... + 15377677530.

It is an arithmetic number, because the mean of its divisors is an integer number (35881247563).

Almost surely, 2^123021420212 is an apocalyptic number.

It is an amenable number.

123021420212 is a deficient number, since it is larger than the sum of its proper divisors (92266065166).

123021420212 is a wasteful number, since it uses less digits than its factorization.

123021420212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30755355057 (or 30755355055 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 123021420212 its reverse (212024120321), we get a palindrome (335045540533).

The spelling of 123021420212 in words is "one hundred twenty-three billion, twenty-one million, four hundred twenty thousand, two hundred twelve".