20122011011 has 4 divisors (see below), whose sum is σ = 20140354872. Its totient is φ = 20103667152.

The previous prime is 20122010941. The next prime is 20122011017. The reversal of 20122011011 is 11011022102.

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 20122011011 - 2¹⁰ = 20122009987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122010983 and 20122011001.

It is not an unprimeable number, because it can be changed into a prime (20122011017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9170285 + ... + 9172478.

It is an arithmetic number, because the mean of its divisors is an integer number (5035088718).

Almost surely, 2^20122011011 is an apocalyptic number.

20122011011 is a deficient number, since it is larger than the sum of its proper divisors (18343861).

20122011011 is a wasteful number, since it uses less digits than its factorization.

20122011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18343860.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20122011011 its reverse (11011022102), we get a palindrome (31133033113).

The spelling of 20122011011 in words is "twenty billion, one hundred twenty-two million, eleven thousand, eleven".