20211011022221 has 16 divisors (see below), whose sum is σ = 20903020689408. Its totient is φ = 19521515473200.

The previous prime is 20211011022187. The next prime is 20211011022229. The reversal of 20211011022221 is 12222011011202.

It is a cyclic number.

It is not a de Polignac number, because 20211011022221 - 2¹⁴ = 20211011005837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20211011022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211011022229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108998630 + ... + 109183896.

It is an arithmetic number, because the mean of its divisors is an integer number (1306438793088).

Almost surely, 2^{20211011022221} is an apocalyptic number.

It is an amenable number.

20211011022221 is a deficient number, since it is larger than the sum of its proper divisors (692009667187).

20211011022221 is a wasteful number, since it uses less digits than its factorization.

20211011022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192032.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20211011022221 its reverse (12222011011202), we get a palindrome (32433022033423).

The spelling of 20211011022221 in words is "twenty trillion, two hundred eleven billion, eleven million, twenty-two thousand, two hundred twenty-one".