20211123221012 has 24 divisors (see below), whose sum is σ = 37513176008616. Its totient is φ = 9495077808128.

The previous prime is 20211123221011. The next prime is 20211123221027. The reversal of 20211123221012 is 21012232111202.

It can be written as a sum of positive squares in 4 ways, for example, as 7095382928656 + 13115740292356 = 2663716^2 + 3621566^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211123221011) 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 7 ways as a sum of consecutive naturals, for example, 250568783 + ... + 250649430.

It is an arithmetic number, because the mean of its divisors is an integer number (1563049000359).

Almost surely, 2^{20211123221012} is an apocalyptic number.

It is an amenable number.

20211123221012 is a deficient number, since it is larger than the sum of its proper divisors (17302052787604).

20211123221012 is a wasteful number, since it uses less digits than its factorization.

20211123221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501218827 (or 501218825 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20211123221012 its reverse (21012232111202), we get a palindrome (41223355332214).

The spelling of 20211123221012 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-three million, two hundred twenty-one thousand, twelve".