212211012220 has 48 divisors (see below), whose sum is σ = 450251923968. Its totient is φ = 84011056640.

The previous prime is 212211012197. The next prime is 212211012229. The reversal of 212211012220 is 22210112212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212211012194 and 212211012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211012229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 611544 + ... + 893536.

It is an arithmetic number, because the mean of its divisors is an integer number (9380248416).

Almost surely, 2^212211012220 is an apocalyptic number.

212211012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212211012220 is an abundant number, since it is smaller than the sum of its proper divisors (238040911748).

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

212211012220 is a wasteful number, since it uses less digits than its factorization.

212211012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282390 (or 282388 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212211012220 its reverse (22210112212), we get a palindrome (234421124432).

The spelling of 212211012220 in words is "two hundred twelve billion, two hundred eleven million, twelve thousand, two hundred twenty".