20201110021001 has 24 divisors (see below), whose sum is σ = 25307174377800. Its totient is φ = 15983113128192.

The previous prime is 20201110020961. The next prime is 20201110021061. The reversal of 20201110021001 is 10012001110202.

It can be written as a sum of positive squares in 4 ways, for example, as 1307317824400 + 18893792196601 = 1143380^2 + 4346699^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20201110021001 is a prime.

It is a super-2 number, since 2×20201110021001² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20201110021061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93817475 + ... + 94032551.

It is an arithmetic number, because the mean of its divisors is an integer number (1054465599075).

Almost surely, 2^{20201110021001} is an apocalyptic number.

It is an amenable number.

20201110021001 is a deficient number, since it is larger than the sum of its proper divisors (5106064356799).

20201110021001 is a wasteful number, since it uses less digits than its factorization.

20201110021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362553 (or 362546 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20201110021001 its reverse (10012001110202), we get a palindrome (30213111131203).

The spelling of 20201110021001 in words is "twenty trillion, two hundred one billion, one hundred ten million, twenty-one thousand, one".