212021031330 has 128 divisors (see below), whose sum is σ = 592969766400. Its totient is φ = 53805894912.

The previous prime is 212021031241. The next prime is 212021031359. The reversal of 212021031330 is 33130120212.

212021031330 is a `hidden beast` number, since 2 + 120 + 210 + 3 + 1 + 330 = 666.

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

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 63 ways as a sum of consecutive naturals, for example, 1136716 + ... + 1310024.

It is an arithmetic number, because the mean of its divisors is an integer number (4632576300).

Almost surely, 2^212021031330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021031330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296484883200).

212021031330 is an abundant number, since it is smaller than the sum of its proper divisors (380948735070).

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

212021031330 is a wasteful number, since it uses less digits than its factorization.

212021031330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173545 (or 173539 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 212021031330 its reverse (33130120212), we get a palindrome (245151151542).

The spelling of 212021031330 in words is "two hundred twelve billion, twenty-one million, thirty-one thousand, three hundred thirty".