212012101220 has 12 divisors (see below), whose sum is σ = 445225412604. Its totient is φ = 84804840480.

The previous prime is 212012101187. The next prime is 212012101247. The reversal of 212012101220 is 22101210212.

It can be written as a sum of positive squares in 2 ways, for example, as 130206948964 + 81805152256 = 360842^2 + 286016^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212012101195 and 212012101204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300302511 + ... + 5300302550.

It is an arithmetic number, because the mean of its divisors is an integer number (37102117717).

Almost surely, 2^212012101220 is an apocalyptic number.

212012101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012101220 is an abundant number, since it is smaller than the sum of its proper divisors (233213311384).

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

212012101220 is a wasteful number, since it uses less digits than its factorization.

212012101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600605070 (or 10600605068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212012101220 its reverse (22101210212), we get a palindrome (234113311432).

The spelling of 212012101220 in words is "two hundred twelve billion, twelve million, one hundred one thousand, two hundred twenty".