20221212122111 has 32 divisors (see below), whose sum is σ = 27418972525056. Its totient is φ = 14400720720000.

The previous prime is 20221212122087. The next prime is 20221212122191. The reversal of 20221212122111 is 11122121212202.

It is a cyclic number.

It is not a de Polignac number, because 20221212122111 - 2¹⁸ = 20221211859967 is a prime.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221212122191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99903905 + ... + 100106106.

It is an arithmetic number, because the mean of its divisors is an integer number (856842891408).

Almost surely, 2^{20221212122111} is an apocalyptic number.

20221212122111 is a deficient number, since it is larger than the sum of its proper divisors (7197760402945).

20221212122111 is a wasteful number, since it uses less digits than its factorization.

20221212122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200010143.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20221212122111 its reverse (11122121212202), we get a palindrome (31343333334313).

Subtracting from 20221212122111 its reverse (11122121212202), we obtain a palindrome (9099090909909).

The spelling of 20221212122111 in words is "twenty trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, one hundred eleven".