1212210121122 has 192 divisors, whose sum is σ = 3621740338944. Its totient is φ = 282784504320.

The previous prime is 1212210121103. The next prime is 1212210121123. The reversal of 1212210121122 is 2211210122121.

1212210121122 is a `hidden beast` number, since 1 + 212 + 210 + 121 + 122 = 666.

It is a super-2 number, since 2×1212210121122² (a number of 25 digits) contains 22 as substring.

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 = 1212210121095 and 1212210121104.

It is not an unprimeable number, because it can be changed into a prime (1212210121123) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 242493 + ... + 1575824.

It is an arithmetic number, because the mean of its divisors is an integer number (18863230932).

Almost surely, 2^{1212210121122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212210121122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1810870169472).

1212210121122 is an abundant number, since it is smaller than the sum of its proper divisors (2409530217822).

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

1212210121122 is a wasteful number, since it uses less digits than its factorization.

1212210121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818393 (or 1818390 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212210121122 its reverse (2211210122121), we get a palindrome (3423420243243).

Subtracting 1212210121122 from its reverse (2211210122121), we obtain a palindrome (999000000999).

The spelling of 1212210121122 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, one hundred twenty-two".