20221221111011 has 4 divisors (see below), whose sum is σ = 20506027042224. Its totient is φ = 19936415179800.

The previous prime is 20221221111001. The next prime is 20221221111031. The reversal of 20221221111011 is 11011112212202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20221221111011 - 2³⁴ = 20204041241827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221221111001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142402965500 + ... + 142402965641.

It is an arithmetic number, because the mean of its divisors is an integer number (5126506760556).

Almost surely, 2^{20221221111011} is an apocalyptic number.

20221221111011 is a deficient number, since it is larger than the sum of its proper divisors (284805931213).

20221221111011 is an equidigital number, since it uses as much as digits as its factorization.

20221221111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284805931212.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20221221111011 its reverse (11011112212202), we get a palindrome (31232333323213).

The spelling of 20221221111011 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, eleven".