210121021220012 has 24 divisors (see below), whose sum is σ = 420694402064160. Its totient is φ = 89954932032000.

The previous prime is 210121021219931. The next prime is 210121021220059. The reversal of 210121021220012 is 210022120121012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4038898739 + ... + 4038950762.

It is an arithmetic number, because the mean of its divisors is an integer number (17528933419340).

Almost surely, 2^{210121021220012} is an apocalyptic number.

It is an amenable number.

210121021220012 is an abundant number, since it is smaller than the sum of its proper divisors (210573380844148).

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

210121021220012 is a wasteful number, since it uses less digits than its factorization.

210121021220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8077850441 (or 8077850439 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210121021220012 its reverse (210022120121012), we get a palindrome (420143141341024).

The spelling of 210121021220012 in words is "two hundred ten trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty thousand, twelve".