212222121120280 has 128 divisors (see below), whose sum is σ = 528004915200000. Its totient is φ = 76408176075264.

The previous prime is 212222121120259. The next prime is 212222121120281. The reversal of 212222121120280 is 82021121222212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222121120281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38136600 + ... + 43345639.

It is an arithmetic number, because the mean of its divisors is an integer number (4125038400000).

Almost surely, 2^{212222121120280} is an apocalyptic number.

212222121120280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212222121120280 is an abundant number, since it is smaller than the sum of its proper divisors (315782794079720).

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

212222121120280 is a wasteful number, since it uses less digits than its factorization.

212222121120280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81482441 (or 81482437 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

Adding to 212222121120280 its reverse (82021121222212), we get a palindrome (294243242342492).

The spelling of 212222121120280 in words is "two hundred twelve trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, two hundred eighty".