20111121106 has 8 divisors (see below), whose sum is σ = 30274037244. Its totient is φ = 10019775360.

The previous prime is 20111121103. The next prime is 20111121139. The reversal of 20111121106 is 60112111102.

It can be written as a sum of positive squares in 2 ways, for example, as 19061944225 + 1049176881 = 138065^2 + 32391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20111121106.

It is not an unprimeable number, because it can be changed into a prime (20111121103) 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, 17891895 + ... + 17893018.

Almost surely, 2^20111121106 is an apocalyptic number.

20111121106 is a deficient number, since it is larger than the sum of its proper divisors (10162916138).

20111121106 is a wasteful number, since it uses less digits than its factorization.

20111121106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35785196.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 20111121106 its reverse (60112111102), we get a palindrome (80223232208).

The spelling of 20111121106 in words is "twenty billion, one hundred eleven million, one hundred twenty-one thousand, one hundred six".