20201221322011 has 8 divisors (see below), whose sum is σ = 21044678684400. Its totient is φ = 19374466085760.

The previous prime is 20201221321987. The next prime is 20201221322137. The reversal of 20201221322011 is 11022312210202.

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 20201221322011 - 2⁹ = 20201221321499 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 20201221322011.

It is not an unprimeable number, because it can be changed into a prime (20201221322911) 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, 4175529066 + ... + 4175533903.

It is an arithmetic number, because the mean of its divisors is an integer number (2630584835550).

Almost surely, 2^{20201221322011} is an apocalyptic number.

20201221322011 is a deficient number, since it is larger than the sum of its proper divisors (843457362389).

20201221322011 is an equidigital number, since it uses as much as digits as its factorization.

20201221322011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351063069.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20201221322011 its reverse (11022312210202), we get a palindrome (31223533532213).

The spelling of 20201221322011 in words is "twenty trillion, two hundred one billion, two hundred twenty-one million, three hundred twenty-two thousand, eleven".