1212210220122 has 144 divisors (see below), whose sum is σ = 3028554023040. Its totient is φ = 349673016000.

The previous prime is 1212210220099. The next prime is 1212210220147. The reversal of 1212210220122 is 2210220122121.

It is a happy number.

1212210220122 is a `hidden beast` number, since 1 + 212 + 210 + 220 + 1 + 22 = 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 = 1212210220095 and 1212210220104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4349347 + ... + 4619657.

It is an arithmetic number, because the mean of its divisors is an integer number (21031625160).

Almost surely, 2^{1212210220122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212210220122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1514277011520).

1212210220122 is an abundant number, since it is smaller than the sum of its proper divisors (1816343802918).

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

1212210220122 is a wasteful number, since it uses less digits than its factorization.

1212210220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270441 (or 270427 counting only the distinct ones).

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

Adding to 1212210220122 its reverse (2210220122121), we get a palindrome (3422430342243).

It can be divided in two parts, 121 and 2210220122, that multiplied together give a palindrome (267436634762).

The spelling of 1212210220122 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-two".