212222220221020 has 24 divisors (see below), whose sum is σ = 445669494753168. Its totient is φ = 84888348604800.

The previous prime is 212222220220919. The next prime is 212222220221021. The reversal of 212222220221020 is 20122022222212.

It is a super-2 number, since 2×212222220221020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212222220220982 and 212222220221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222220221021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30484446 + ... + 36793285.

It is an arithmetic number, because the mean of its divisors is an integer number (18569562281382).

Almost surely, 2^{212222220221020} is an apocalyptic number.

212222220221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212222220221020 is an abundant number, since it is smaller than the sum of its proper divisors (233447274532148).

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

212222220221020 is a wasteful number, since it uses less digits than its factorization.

212222220221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67435461 (or 67435459 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 212222220221020 its reverse (20122022222212), we get a palindrome (232344242443232).

The spelling of 212222220221020 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty-one thousand, twenty".