212021003220 has 48 divisors (see below), whose sum is σ = 639324873600. Its totient is φ = 52189785216.

The previous prime is 212021003219. The next prime is 212021003237. The reversal of 212021003220 is 22300120212.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 212021003220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135910120 + ... + 135911679.

It is an arithmetic number, because the mean of its divisors is an integer number (13319268200).

Almost surely, 2^212021003220 is an apocalyptic number.

212021003220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021003220 is an abundant number, since it is smaller than the sum of its proper divisors (427303870380).

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

212021003220 is a wasteful number, since it uses less digits than its factorization.

212021003220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271821824 (or 271821822 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 212021003220 its reverse (22300120212), we get a palindrome (234321123432).

The spelling of 212021003220 in words is "two hundred twelve billion, twenty-one million, three thousand, two hundred twenty".