20020021101011 has 4 divisors (see below), whose sum is σ = 20054126759352. Its totient is φ = 19985915442672.

The previous prime is 20020021100999. The next prime is 20020021101013. The reversal of 20020021101011 is 11010112002002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020021101011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020021100983 and 20020021101001.

It is not an unprimeable number, because it can be changed into a prime (20020021101013) 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, 17052828290 + ... + 17052829463.

It is an arithmetic number, because the mean of its divisors is an integer number (5013531689838).

Almost surely, 2^{20020021101011} is an apocalyptic number.

20020021101011 is a deficient number, since it is larger than the sum of its proper divisors (34105658341).

20020021101011 is an equidigital number, since it uses as much as digits as its factorization.

20020021101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34105658340.

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

Adding to 20020021101011 its reverse (11010112002002), we get a palindrome (31030133103013).

Subtracting from 20020021101011 its reverse (11010112002002), we obtain a palindrome (9009909099009).

It can be divided in two parts, 2002002 and 1101011, that multiplied together give a palindrome (2204226224022).

The spelling of 20020021101011 in words is "twenty trillion, twenty billion, twenty-one million, one hundred one thousand, eleven".