11000020020021 has 24 divisors (see below), whose sum is σ = 16080620477376. Its totient is φ = 7244871491520.

The previous prime is 11000020020019. The next prime is 11000020020029. The reversal of 11000020020021 is 12002002000011.

It is not a de Polignac number, because 11000020020021 - 2¹ = 11000020020019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11000020019985 and 11000020020012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000020020029) 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, 74740776 + ... + 74887806.

It is an arithmetic number, because the mean of its divisors is an integer number (670025853224).

Almost surely, 2^{11000020020021} is an apocalyptic number.

It is an amenable number.

11000020020021 is a deficient number, since it is larger than the sum of its proper divisors (5080600457355).

11000020020021 is a wasteful number, since it uses less digits than its factorization.

11000020020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247273 (or 247270 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 11000020020021 its reverse (12002002000011), we get a palindrome (23002022020032).

The spelling of 11000020020021 in words is "eleven trillion, twenty million, twenty thousand, twenty-one".