212112021320 has 32 divisors (see below), whose sum is σ = 477645604920. Its totient is φ = 84774842880.

The previous prime is 212112021301. The next prime is 212112021347. The reversal of 212112021320 is 23120211212.

It can be written as a sum of positive squares in 4 ways, for example, as 67601040004 + 144510981316 = 260002^2 + 380146^2 .

It is a super-2 number, since 2×212112021320² (a number of 23 digits) contains 22 as substring.

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, 2137301 + ... + 2234340.

Almost surely, 2^212112021320 is an apocalyptic number.

212112021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212112021320 is an abundant number, since it is smaller than the sum of its proper divisors (265533583600).

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

212112021320 is a wasteful number, since it uses less digits than its factorization.

212112021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372865 (or 4372861 counting only the distinct ones).

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

Adding to 212112021320 its reverse (23120211212), we get a palindrome (235232232532).

The spelling of 212112021320 in words is "two hundred twelve billion, one hundred twelve million, twenty-one thousand, three hundred twenty".