212220021012 has 24 divisors (see below), whose sum is σ = 505715796096. Its totient is φ = 69234900288.

The previous prime is 212220020989. The next prime is 212220021077. The reversal of 212220021012 is 210120022212.

It is a junction number, because it is equal to n+sod(n) for n = 212220020982 and 212220021000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188137753 + ... + 188138880.

It is an arithmetic number, because the mean of its divisors is an integer number (21071491504).

Almost surely, 2^212220021012 is an apocalyptic number.

It is an amenable number.

212220021012 is an abundant number, since it is smaller than the sum of its proper divisors (293495775084).

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

212220021012 is a wasteful number, since it uses less digits than its factorization.

212220021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376276687 (or 376276685 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212220021012 its reverse (210120022212), we get a palindrome (422340043224).

The spelling of 212220021012 in words is "two hundred twelve billion, two hundred twenty million, twenty-one thousand, twelve".