20211020012001 has 192 divisors, whose sum is σ = 34374630850560. Its totient is φ = 10281321308160.

The previous prime is 20211020011993. The next prime is 20211020012041. The reversal of 20211020012001 is 10021002011202.

It is not a de Polignac number, because 20211020012001 - 2³ = 20211020011993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20211020012041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 46038769740 + ... + 46038770178.

It is an arithmetic number, because the mean of its divisors is an integer number (179034535680).

Almost surely, 2^{20211020012001} is an apocalyptic number.

20211020012001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20211020012001 is a deficient number, since it is larger than the sum of its proper divisors (14163610838559).

20211020012001 is a wasteful number, since it uses less digits than its factorization.

20211020012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20211020012001 its reverse (10021002011202), we get a palindrome (30232022023203).

The spelling of 20211020012001 in words is "twenty trillion, two hundred eleven billion, twenty million, twelve thousand, one".