2021121221012 has 12 divisors (see below), whose sum is σ = 3536976865716. Its totient is φ = 1010556402240.

The previous prime is 2021121221011. The next prime is 2021121221029. The reversal of 2021121221012 is 2101221211202.

It can be written as a sum of positive squares in 2 ways, for example, as 913545993616 + 1107575227396 = 955796^2 + 1052414^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021121221011) 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 3 ways as a sum of consecutive naturals, for example, 192008 + ... + 2019680.

It is an arithmetic number, because the mean of its divisors is an integer number (294748072143).

Almost surely, 2^{2021121221012} is an apocalyptic number.

It is an amenable number.

2021121221012 is a deficient number, since it is larger than the sum of its proper divisors (1515855644704).

2021121221012 is a wasteful number, since it uses less digits than its factorization.

2021121221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104138 (or 2104136 counting only the distinct ones).

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

Adding to 2021121221012 its reverse (2101221211202), we get a palindrome (4122342432214).

The spelling of 2021121221012 in words is "two trillion, twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, twelve".