122122212120 has 96 divisors (see below), whose sum is σ = 397064229120. Its totient is φ = 32552217600.

The previous prime is 122122212083. The next prime is 122122212139. The reversal of 122122212120 is 21212221221.

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 = 122122212093 and 122122212102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 799945 + ... + 940295.

It is an arithmetic number, because the mean of its divisors is an integer number (4136085720).

Almost surely, 2^122122212120 is an apocalyptic number.

122122212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122122212120 is an abundant number, since it is smaller than the sum of its proper divisors (274942017000).

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

122122212120 is a wasteful number, since it uses less digits than its factorization.

122122212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142785 (or 142778 counting only the distinct ones).

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

Adding to 122122212120 its reverse (21212221221), we get a palindrome (143334433341).

The spelling of 122122212120 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty".