12122201220210 has 24 divisors (see below), whose sum is σ = 31517723172780. Its totient is φ = 3232586992032.

The previous prime is 12122201220197. The next prime is 12122201220211. The reversal of 12122201220210 is 1202210222121.

It is a happy number.

12122201220210 is a `hidden beast` number, since 1 + 2 + 12 + 220 + 1 + 220 + 210 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11139967600281 + 982233619929 = 3337659^2 + 991077^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12122201220211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67345562245 + ... + 67345562424.

Almost surely, 2^{12122201220210} is an apocalyptic number.

12122201220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12122201220210 is an abundant number, since it is smaller than the sum of its proper divisors (19395521952570).

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

12122201220210 is a wasteful number, since it uses less digits than its factorization.

12122201220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134691124682 (or 134691124679 counting only the distinct ones).

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

Adding to 12122201220210 its reverse (1202210222121), we get a palindrome (13324411442331).

The spelling of 12122201220210 in words is "twelve trillion, one hundred twenty-two billion, two hundred one million, two hundred twenty thousand, two hundred ten".