12122210221020 has 72 divisors (see below), whose sum is σ = 36963221218560. Its totient is φ = 3215664831360.

The previous prime is 12122210221003. The next prime is 12122210221021. The reversal of 12122210221020 is 2012201222121.

It is a happy number.

12122210221020 is a `hidden beast` number, since 1 + 212 + 2 + 210 + 221 + 0 + 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 = 12122210220984 and 12122210221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122210221021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176263035 + ... + 176331794.

It is an arithmetic number, because the mean of its divisors is an integer number (513378072480).

Almost surely, 2^{12122210221020} is an apocalyptic number.

12122210221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122210221020 is an abundant number, since it is smaller than the sum of its proper divisors (24841010997540).

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

12122210221020 is a wasteful number, since it uses less digits than its factorization.

12122210221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352595035 (or 352595030 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12122210221020 its reverse (2012201222121), we get a palindrome (14134411443141).

The spelling of 12122210221020 in words is "twelve trillion, one hundred twenty-two billion, two hundred ten million, two hundred twenty-one thousand, twenty".