20221210021111 has 16 divisors (see below), whose sum is σ = 22378264846848. Its totient is φ = 18270139365720.

The previous prime is 20221210021099. The next prime is 20221210021169. The reversal of 20221210021111 is 11112001212202.

It is not a de Polignac number, because 20221210021111 - 2²⁵ = 20221176466679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221210031111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46385791 + ... + 46819696.

It is an arithmetic number, because the mean of its divisors is an integer number (1398641552928).

Almost surely, 2^{20221210021111} is an apocalyptic number.

20221210021111 is a deficient number, since it is larger than the sum of its proper divisors (2157054825737).

20221210021111 is an equidigital number, since it uses as much as digits as its factorization.

20221210021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93205683 (or 93205661 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20221210021111 its reverse (11112001212202), we get a palindrome (31333211233313).

The spelling of 20221210021111 in words is "twenty trillion, two hundred twenty-one billion, two hundred ten million, twenty-one thousand, one hundred eleven".