212331021320 has 64 divisors (see below), whose sum is σ = 521920376640. Its totient is φ = 77101024000.

The previous prime is 212331021319. The next prime is 212331021337. The reversal of 212331021320 is 23120133212.

It is a super-2 number, since 2×212331021320² (a number of 23 digits) contains 22 as substring.

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 = 212331021292 and 212331021301.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35762 + ... + 652641.

It is an arithmetic number, because the mean of its divisors is an integer number (8155005885).

Almost surely, 2^212331021320 is an apocalyptic number.

212331021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212331021320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260960188320).

212331021320 is an abundant number, since it is smaller than the sum of its proper divisors (309589355320).

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

212331021320 is a wasteful number, since it uses less digits than its factorization.

212331021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689126 (or 689122 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 212331021320 its reverse (23120133212), we get a palindrome (235451154532).

The spelling of 212331021320 in words is "two hundred twelve billion, three hundred thirty-one million, twenty-one thousand, three hundred twenty".