20021001201201 has 144 divisors (see below), whose sum is σ = 37673705786688. Its totient is φ = 9341002944000.

The previous prime is 20021001201199. The next prime is 20021001201233. The reversal of 20021001201201 is 10210210012002.

It is not a de Polignac number, because 20021001201201 - 2¹ = 20021001201199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021001201241) 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 143 ways as a sum of consecutive naturals, for example, 9121051 + ... + 11101151.

It is an arithmetic number, because the mean of its divisors is an integer number (261622956852).

Almost surely, 2^{20021001201201} is an apocalyptic number.

20021001201201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20021001201201 is a deficient number, since it is larger than the sum of its proper divisors (17652704585487).

20021001201201 is a wasteful number, since it uses less digits than its factorization.

20021001201201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980192 (or 1980172 counting only the distinct ones).

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

Adding to 20021001201201 its reverse (10210210012002), we get a palindrome (30231211213203).

It can be divided in two parts, 20021001 and 201201, that added together give a palindrome (20222202).

The spelling of 20021001201201 in words is "twenty trillion, twenty-one billion, one million, two hundred one thousand, two hundred one".