212021021320 has 32 divisors (see below), whose sum is σ = 487197244800. Its totient is φ = 83003973568.

The previous prime is 212021021297. The next prime is 212021021357. The reversal of 212021021320 is 23120120212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212021021294 and 212021021303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56386690 + ... + 56390449.

It is an arithmetic number, because the mean of its divisors is an integer number (15224913900).

Almost surely, 2^212021021320 is an apocalyptic number.

212021021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021021320 is an abundant number, since it is smaller than the sum of its proper divisors (275176223480).

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

212021021320 is a wasteful number, since it uses less digits than its factorization.

212021021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112777197 (or 112777193 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212021021320 its reverse (23120120212), we get a palindrome (235141141532).

The spelling of 212021021320 in words is "two hundred twelve billion, twenty-one million, twenty-one thousand, three hundred twenty".