212221130022 has 96 divisors (see below), whose sum is σ = 508239912960. Its totient is φ = 63460800000.

The previous prime is 212221129957. The next prime is 212221130039. The reversal of 212221130022 is 220031122212.

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 = 212221129977 and 212221130004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53040022 + ... + 53044022.

It is an arithmetic number, because the mean of its divisors is an integer number (5294165760).

Almost surely, 2^212221130022 is an apocalyptic number.

212221130022 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 212221130022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254119956480).

212221130022 is an abundant number, since it is smaller than the sum of its proper divisors (296018782938).

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

212221130022 is a wasteful number, since it uses less digits than its factorization.

212221130022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490 (or 7487 counting only the distinct ones).

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

Adding to 212221130022 its reverse (220031122212), we get a palindrome (432252252234).

It can be divided in two parts, 212221 and 130022, that added together give a palindrome (342243).

The spelling of 212221130022 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred thirty thousand, twenty-two".