212021223030 has 64 divisors (see below), whose sum is σ = 570987921600. Its totient is φ = 55979193600.

The previous prime is 212021223019. The next prime is 212021223047. The reversal of 212021223030 is 30322120212.

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

It is a junction number, because it is equal to n+sod(n) for n = 212021222994 and 212021223012.

It is a congruent number.

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, 3860175 + ... + 3914714.

It is an arithmetic number, because the mean of its divisors is an integer number (8921686275).

Almost surely, 2^212021223030 is an apocalyptic number.

212021223030 is an abundant number, since it is smaller than the sum of its proper divisors (358966698570).

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

212021223030 is a wasteful number, since it uses less digits than its factorization.

212021223030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7775006 (or 7775000 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 212021223030 its reverse (30322120212), we get a palindrome (242343343242).

The spelling of 212021223030 in words is "two hundred twelve billion, twenty-one million, two hundred twenty-three thousand, thirty".