212223220020 has 192 divisors, whose sum is σ = 770626805760. Its totient is φ = 47476036224.

The previous prime is 212223219997. The next prime is 212223220051. The reversal of 212223220020 is 20022322212.

212223220020 is a `hidden beast` number, since 212 + 2 + 232 + 200 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212223219975 and 212223220002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 419614 + ... + 774933.

It is an arithmetic number, because the mean of its divisors is an integer number (4013681280).

Almost surely, 2^212223220020 is an apocalyptic number.

212223220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212223220020 is an abundant number, since it is smaller than the sum of its proper divisors (558403585740).

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

212223220020 is a wasteful number, since it uses less digits than its factorization.

212223220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194619 (or 1194611 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 212223220020 its reverse (20022322212), we get a palindrome (232245542232).

The spelling of 212223220020 in words is "two hundred twelve billion, two hundred twenty-three million, two hundred twenty thousand, twenty".