20201021102011 has 4 divisors (see below), whose sum is σ = 20206170486792. Its totient is φ = 20195871717232.

The previous prime is 20201021101973. The next prime is 20201021102039. The reversal of 20201021102011 is 11020112010202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20201021102011 - 2¹³ = 20201021093819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201021101982 and 20201021102000.

It is not an unprimeable number, because it can be changed into a prime (20201021112011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2574686506 + ... + 2574694351.

It is an arithmetic number, because the mean of its divisors is an integer number (5051542621698).

Almost surely, 2^{20201021102011} is an apocalyptic number.

20201021102011 is a deficient number, since it is larger than the sum of its proper divisors (5149384781).

20201021102011 is an equidigital number, since it uses as much as digits as its factorization.

20201021102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149384780.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20201021102011 its reverse (11020112010202), we get a palindrome (31221133112213).

The spelling of 20201021102011 in words is "twenty trillion, two hundred one billion, twenty-one million, one hundred two thousand, eleven".