20212222121111 has 32 divisors (see below), whose sum is σ = 21458515852800. Its totient is φ = 18985013470080.

The previous prime is 20212222121099. The next prime is 20212222121173. The reversal of 20212222121111 is 11112122221202.

It is a cyclic number.

It is not a de Polignac number, because 20212222121111 - 2¹⁴ = 20212222104727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212222121711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1136594726 + ... + 1136612508.

It is an arithmetic number, because the mean of its divisors is an integer number (670578620400).

Almost surely, 2^{20212222121111} is an apocalyptic number.

20212222121111 is a deficient number, since it is larger than the sum of its proper divisors (1246293731689).

20212222121111 is a wasteful number, since it uses less digits than its factorization.

20212222121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19079.

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

Adding to 20212222121111 its reverse (11112122221202), we get a palindrome (31324344342313).

The spelling of 20212222121111 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".