212021121708 has 36 divisors (see below), whose sum is σ = 584664306408. Its totient is φ = 64248824640.

The previous prime is 212021121661. The next prime is 212021121709. The reversal of 212021121708 is 807121120212.

It is a happy number.

212021121708 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (212021121709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267703041 + ... + 267703832.

It is an arithmetic number, because the mean of its divisors is an integer number (16240675178).

Almost surely, 2^212021121708 is an apocalyptic number.

It is an amenable number.

212021121708 is an abundant number, since it is smaller than the sum of its proper divisors (372643184700).

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

212021121708 is a wasteful number, since it uses less digits than its factorization.

212021121708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535406894 (or 535406889 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The spelling of 212021121708 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, seven hundred eight".