212021123320 has 32 divisors (see below), whose sum is σ = 484867984320. Its totient is φ = 83418145920.

The previous prime is 212021123239. The next prime is 212021123323. The reversal of 212021123320 is 23321120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021123323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43444512 + ... + 43449391.

It is an arithmetic number, because the mean of its divisors is an integer number (15152124510).

Almost surely, 2^212021123320 is an apocalyptic number.

212021123320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021123320 is an abundant number, since it is smaller than the sum of its proper divisors (272846861000).

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

212021123320 is a wasteful number, since it uses less digits than its factorization.

212021123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86893975 (or 86893971 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212021123320 its reverse (23321120212), we get a palindrome (235342243532).

The spelling of 212021123320 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-three thousand, three hundred twenty".