1212120222120 has 128 divisors (see below), whose sum is σ = 4126366886400. Its totient is φ = 316354768128.

The previous prime is 1212120222109. The next prime is 1212120222121. The reversal of 1212120222120 is 212220212121.

It is a happy number.

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 = 1212120222093 and 1212120222102.

It is not an unprimeable number, because it can be changed into a prime (1212120222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11888959 + ... + 11990478.

It is an arithmetic number, because the mean of its divisors is an integer number (32237241300).

Almost surely, 2^{1212120222120} is an apocalyptic number.

1212120222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212120222120 is an abundant number, since it is smaller than the sum of its proper divisors (2914246664280).

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

1212120222120 is a wasteful number, since it uses less digits than its factorization.

1212120222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23879504 (or 23879494 counting only the distinct ones).

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

Adding to 1212120222120 its reverse (212220212121), we get a palindrome (1424340434241).

Subtracting from 1212120222120 its reverse (212220212121), we obtain a palindrome (999900009999).

The spelling of 1212120222120 in words is "one trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty".