20210120222001 has 32 divisors (see below), whose sum is σ = 27636852672000. Its totient is φ = 13132923213696.

The previous prime is 20210120221999. The next prime is 20210120222029. The reversal of 20210120222001 is 10022202101202.

It is not a de Polignac number, because 20210120222001 - 2¹ = 20210120221999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20210120222041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17883250 + ... + 18979748.

It is an arithmetic number, because the mean of its divisors is an integer number (863651646000).

Almost surely, 2^{20210120222001} is an apocalyptic number.

It is an amenable number.

20210120222001 is a deficient number, since it is larger than the sum of its proper divisors (7426732449999).

20210120222001 is a wasteful number, since it uses less digits than its factorization.

20210120222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097533.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20210120222001 its reverse (10022202101202), we get a palindrome (30232322323203).

The spelling of 20210120222001 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, two hundred twenty-two thousand, one".