20212120121001 has 16 divisors (see below), whose sum is σ = 27822159482880. Its totient is φ = 13038517737360.

The previous prime is 20212120120999. The next prime is 20212120121009. The reversal of 20212120121001 is 10012102121202.

It is not a de Polignac number, because 20212120121001 - 2¹ = 20212120120999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20212120121009) 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 15 ways as a sum of consecutive naturals, for example, 12216061 + ... + 13771578.

It is an arithmetic number, because the mean of its divisors is an integer number (1738884967680).

Almost surely, 2^{20212120121001} is an apocalyptic number.

It is an amenable number.

20212120121001 is a deficient number, since it is larger than the sum of its proper divisors (7610039361879).

20212120121001 is a wasteful number, since it uses less digits than its factorization.

20212120121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25996036.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20212120121001 its reverse (10012102121202), we get a palindrome (30224222242203).

The spelling of 20212120121001 in words is "twenty trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty-one thousand, one".