212212011220 has 24 divisors (see below), whose sum is σ = 486158426208. Its totient is φ = 77168004000.

The previous prime is 212212011203. The next prime is 212212011283. The reversal of 212212011220 is 22110212212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212212011194 and 212212011203.

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, 482299806 + ... + 482300245.

It is an arithmetic number, because the mean of its divisors is an integer number (20256601092).

Almost surely, 2^212212011220 is an apocalyptic number.

212212011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212212011220 is an abundant number, since it is smaller than the sum of its proper divisors (273946414988).

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

212212011220 is a wasteful number, since it uses less digits than its factorization.

212212011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964600071 (or 964600069 counting only the distinct ones).

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

Adding to 212212011220 its reverse (22110212212), we get a palindrome (234322223432).

The spelling of 212212011220 in words is "two hundred twelve billion, two hundred twelve million, eleven thousand, two hundred twenty".