212021013320 has 128 divisors (see below), whose sum is σ = 498853555200. Its totient is φ = 81037926144.

The previous prime is 212021013293. The next prime is 212021013343. The reversal of 212021013320 is 23310120212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14697071 + ... + 14711489.

It is an arithmetic number, because the mean of its divisors is an integer number (3897293400).

Almost surely, 2^212021013320 is an apocalyptic number.

212021013320 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 212021013320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249426777600).

212021013320 is an abundant number, since it is smaller than the sum of its proper divisors (286832541880).

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

212021013320 is a wasteful number, since it uses less digits than its factorization.

212021013320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14659 (or 14655 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212021013320 its reverse (23310120212), we get a palindrome (235331133532).

The spelling of 212021013320 in words is "two hundred twelve billion, twenty-one million, thirteen thousand, three hundred twenty".