212120122122 has 24 divisors (see below), whose sum is σ = 460529652960. Its totient is φ = 70562698920.

The previous prime is 212120122121. The next prime is 212120122127. The reversal of 212120122122 is 221221021212.

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 = 212120122095 and 212120122104.

It is not an unprimeable number, because it can be changed into a prime (212120122121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11991622 + ... + 12009297.

It is an arithmetic number, because the mean of its divisors is an integer number (19188735540).

Almost surely, 2^212120122122 is an apocalyptic number.

212120122122 is an abundant number, since it is smaller than the sum of its proper divisors (248409530838).

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

212120122122 is a wasteful number, since it uses less digits than its factorization.

212120122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24001418 (or 24001415 counting only the distinct ones).

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

Adding to 212120122122 its reverse (221221021212), we get a palindrome (433341143334).

The spelling of 212120122122 in words is "two hundred twelve billion, one hundred twenty million, one hundred twenty-two thousand, one hundred twenty-two".