212021130030 has 64 divisors (see below), whose sum is σ = 518014987776. Its totient is φ = 55523664000.

The previous prime is 212021130001. The next prime is 212021130037. The reversal of 212021130030 is 30031120212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 212021129991 and 212021130009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021130037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1062925 + ... + 1246535.

It is an arithmetic number, because the mean of its divisors is an integer number (8093984184).

Almost surely, 2^212021130030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021130030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259007493888).

212021130030 is an abundant number, since it is smaller than the sum of its proper divisors (305993857746).

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

212021130030 is a wasteful number, since it uses less digits than its factorization.

212021130030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184313.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 212021130030 its reverse (30031120212), we get a palindrome (242052250242).

The spelling of 212021130030 in words is "two hundred twelve billion, twenty-one million, one hundred thirty thousand, thirty".