20112122211111 has 12 divisors (see below), whose sum is σ = 33200963650192. Its totient is φ = 11492641263456.

The previous prime is 20112122211109. The next prime is 20112122211131. The reversal of 20112122211111 is 11111222121102.

It is a happy number.

20112122211111 is a `hidden beast` number, since 201 + 121 + 22 + 211 + 111 = 666.

It is not a de Polignac number, because 20112122211111 - 2¹ = 20112122211109 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 (20112122211101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159620017486 + ... + 159620017611.

Almost surely, 2^{20112122211111} is an apocalyptic number.

20112122211111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20112122211111 is a deficient number, since it is larger than the sum of its proper divisors (13088841439081).

20112122211111 is a wasteful number, since it uses less digits than its factorization.

20112122211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319240035110 (or 319240035107 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 20112122211111 its reverse (11111222121102), we get a palindrome (31223344332213).

Subtracting from 20112122211111 its reverse (11111222121102), we obtain a palindrome (9000900090009).

The spelling of 20112122211111 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-two million, two hundred eleven thousand, one hundred eleven".