212021113320 has 96 divisors (see below), whose sum is σ = 707692138920. Its totient is φ = 55010880000.

The previous prime is 212021113301. The next prime is 212021113321. The reversal of 212021113320 is 23311120212.

212021113320 is a `hidden beast` number, since 2 + 120 + 211 + 1 + 332 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 201362202756 + 10658910564 = 448734^2 + 103242^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212021113293 and 212021113302.

It is not an unprimeable number, because it can be changed into a prime (212021113321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7945431 + ... + 7972070.

Almost surely, 2^212021113320 is an apocalyptic number.

212021113320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021113320 is an abundant number, since it is smaller than the sum of its proper divisors (495671025600).

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

212021113320 is a wasteful number, since it uses less digits than its factorization.

212021113320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15917555 (or 15917548 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212021113320 its reverse (23311120212), we get a palindrome (235332233532).

The spelling of 212021113320 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, three hundred twenty".