20021100221011 has 4 divisors (see below), whose sum is σ = 20021239364752. Its totient is φ = 20020961077272.

The previous prime is 20021100220997. The next prime is 20021100221021. The reversal of 20021100221011 is 11012200112002.

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 20021100221011 - 2¹⁹ = 20021099696723 is a prime.

It is a super-3 number, since 3×20021100221011³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021100220982 and 20021100221000.

It is not an unprimeable number, because it can be changed into a prime (20021100221021) 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, 69355815 + ... + 69643888.

It is an arithmetic number, because the mean of its divisors is an integer number (5005309841188).

Almost surely, 2^{20021100221011} is an apocalyptic number.

20021100221011 is a deficient number, since it is larger than the sum of its proper divisors (139143741).

20021100221011 is a wasteful number, since it uses less digits than its factorization.

20021100221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139143740.

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

Adding to 20021100221011 its reverse (11012200112002), we get a palindrome (31033300333013).

The spelling of 20021100221011 in words is "twenty trillion, twenty-one billion, one hundred million, two hundred twenty-one thousand, eleven".