20212212128 has 48 divisors (see below), whose sum is σ = 41184430560. Its totient is φ = 9753004800.

The previous prime is 20212212121. The next prime is 20212212161. The reversal of 20212212128 is 82121221202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20212212121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2753423 + ... + 2760753.

It is an arithmetic number, because the mean of its divisors is an integer number (858008970).

Almost surely, 2^20212212128 is an apocalyptic number.

It is an amenable number.

20212212128 is an abundant number, since it is smaller than the sum of its proper divisors (20972218432).

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

20212212128 is a wasteful number, since it uses less digits than its factorization.

20212212128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10341 (or 10333 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The spelling of 20212212128 in words is "twenty billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-eight".