20122011111 has 16 divisors (see below), whose sum is σ = 27355768416. Its totient is φ = 13151838336.

The previous prime is 20122011109. The next prime is 20122011149. The reversal of 20122011111 is 11111022102.

It is not a de Polignac number, because 20122011111 - 2¹ = 20122011109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122016111) 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, 172221 + ... + 264393.

It is an arithmetic number, because the mean of its divisors is an integer number (1709735526).

Almost surely, 2^20122011111 is an apocalyptic number.

20122011111 is a deficient number, since it is larger than the sum of its proper divisors (7233757305).

20122011111 is a wasteful number, since it uses less digits than its factorization.

20122011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93602.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20122011111 its reverse (11111022102), we get a palindrome (31233033213).

The spelling of 20122011111 in words is "twenty billion, one hundred twenty-two million, eleven thousand, one hundred eleven".