20122112011 has 4 divisors (see below), whose sum is σ = 20122463224. Its totient is φ = 20121760800.

The previous prime is 20122112009. The next prime is 20122112053. The reversal of 20122112011 is 11021122102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20122112011 - 2¹ = 20122112009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122111982 and 20122112000.

It is not an unprimeable number, because it can be changed into a prime (20122112071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67470 + ... + 211651.

It is an arithmetic number, because the mean of its divisors is an integer number (5030615806).

Almost surely, 2^20122112011 is an apocalyptic number.

20122112011 is a deficient number, since it is larger than the sum of its proper divisors (351213).

20122112011 is an equidigital number, since it uses as much as digits as its factorization.

20122112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351212.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20122112011 its reverse (11021122102), we get a palindrome (31143234113).

The spelling of 20122112011 in words is "twenty billion, one hundred twenty-two million, one hundred twelve thousand, eleven".