2121220120122 has 24 divisors (see below), whose sum is σ = 4607976881664. Its totient is φ = 705227226504.

The previous prime is 2121220120087. The next prime is 2121220120139. The reversal of 2121220120122 is 2210210221212.

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 = 2121220120095 and 2121220120104.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 153838488 + ... + 153852275.

It is an arithmetic number, because the mean of its divisors is an integer number (191999036736).

Almost surely, 2^{2121220120122} is an apocalyptic number.

2121220120122 is an abundant number, since it is smaller than the sum of its proper divisors (2486756761542).

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

2121220120122 is a wasteful number, since it uses less digits than its factorization.

2121220120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307691154 (or 307691151 counting only the distinct ones).

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

Adding to 2121220120122 its reverse (2210210221212), we get a palindrome (4331430341334).

The spelling of 2121220120122 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-two".