21020221100011 has 8 divisors (see below), whose sum is σ = 24198460996320. Its totient is φ = 17885818995648.

The previous prime is 21020221099993. The next prime is 21020221100051. The reversal of 21020221100011 is 11000112202012.

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 21020221100011 - 2⁹ = 21020221099499 is a prime.

It is a super-3 number, since 3×21020221100011³ (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 = 21020221099964 and 21020221100000.

It is not an unprimeable number, because it can be changed into a prime (21020221100051) 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, 10959446956 + ... + 10959448873.

It is an arithmetic number, because the mean of its divisors is an integer number (3024807624540).

Almost surely, 2^{21020221100011} is an apocalyptic number.

21020221100011 is a deficient number, since it is larger than the sum of its proper divisors (3178239896309).

21020221100011 is a wasteful number, since it uses less digits than its factorization.

21020221100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21918895973.

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

Adding to 21020221100011 its reverse (11000112202012), we get a palindrome (32020333302023).

The spelling of 21020221100011 in words is "twenty-one trillion, twenty billion, two hundred twenty-one million, one hundred thousand, eleven".