212012121320 has 16 divisors (see below), whose sum is σ = 477027273060. Its totient is φ = 84804848512.

The previous prime is 212012121283. The next prime is 212012121329. The reversal of 212012121320 is 23121210212.

212012121320 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 184826047396 + 27186073924 = 429914^2 + 164882^2 .

It is not an unprimeable number, because it can be changed into a prime (212012121329) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2650151477 + ... + 2650151556.

Almost surely, 2^212012121320 is an apocalyptic number.

212012121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012121320 is an abundant number, since it is smaller than the sum of its proper divisors (265015151740).

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

212012121320 is a wasteful number, since it uses less digits than its factorization.

212012121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300303044 (or 5300303040 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212012121320 its reverse (23121210212), we get a palindrome (235133331532).

The spelling of 212012121320 in words is "two hundred twelve billion, twelve million, one hundred twenty-one thousand, three hundred twenty".