212021031222 has 256 divisors, whose sum is σ = 669818419200. Its totient is φ = 47843758080.

The previous prime is 212021031199. The next prime is 212021031223. The reversal of 212021031222 is 222130120212.

212021031222 is a `hidden beast` number, since 2 + 120 + 210 + 312 + 22 = 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 = 212021031195 and 212021031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021031223) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 803554 + ... + 1034282.

It is an arithmetic number, because the mean of its divisors is an integer number (2616478200).

Almost surely, 2^212021031222 is an apocalyptic number.

212021031222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021031222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334909209600).

212021031222 is an abundant number, since it is smaller than the sum of its proper divisors (457797387978).

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

212021031222 is a wasteful number, since it uses less digits than its factorization.

212021031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230788 (or 230782 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212021031222 its reverse (222130120212), we get a palindrome (434151151434).

The spelling of 212021031222 in words is "two hundred twelve billion, twenty-one million, thirty-one thousand, two hundred twenty-two".