11021012020021 has 8 divisors (see below), whose sum is σ = 11064790712664. Its totient is φ = 10977240268800.

The previous prime is 11021012020003. The next prime is 11021012020069. The reversal of 11021012020021 is 12002021012011.

It can be written as a sum of positive squares in 4 ways, for example, as 7804061280625 + 3216950739396 = 2793575^2 + 1793586^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11021012020021 - 2¹¹ = 11021012017973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021012019983 and 11021012020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021012020091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458031 + ... + 4916083.

It is an arithmetic number, because the mean of its divisors is an integer number (1383098839083).

Almost surely, 2^{11021012020021} is an apocalyptic number.

It is an amenable number.

11021012020021 is a deficient number, since it is larger than the sum of its proper divisors (43778692643).

11021012020021 is a wasteful number, since it uses less digits than its factorization.

11021012020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470711.

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

Adding to 11021012020021 its reverse (12002021012011), we get a palindrome (23023033032032).

The spelling of 11021012020021 in words is "eleven trillion, twenty-one billion, twelve million, twenty thousand, twenty-one".