212211312320 has 56 divisors (see below), whose sum is σ = 577517934624. Its totient is φ = 72758163456.

The previous prime is 212211312289. The next prime is 212211312323. The reversal of 212211312320 is 23213112212.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212211312292 and 212211312301.

It is not an unprimeable number, because it can be changed into a prime (212211312323) 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 7 ways as a sum of consecutive naturals, for example, 47366357 + ... + 47370836.

Almost surely, 2^212211312320 is an apocalyptic number.

212211312320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212211312320 is an abundant number, since it is smaller than the sum of its proper divisors (365306622304).

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

212211312320 is an equidigital number, since it uses as much as digits as its factorization.

212211312320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94737217 (or 94737207 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212211312320 its reverse (23213112212), we get a palindrome (235424424532).

The spelling of 212211312320 in words is "two hundred twelve billion, two hundred eleven million, three hundred twelve thousand, three hundred twenty".